The Lord has different names according to His different activities. For example, His name is Madhusūdana because He killed the demon of the name Madhu; His name is Govinda because He gives pleasure to the cows and to the senses; His name is Vāsudeva because He appeared as the son of Vasudeva; His name is Devakī-nandana because He accepted Devakī as His mother; His name is Yaśodā-nandana because He awarded His childhood pastimes to Yaśodā at Vṛndāvana; His name is Pārtha-sārathi because He worked as charioteer of His friend Arjuna.
(Bhagavad-Gita----1:14----purport).

In the Rāma incarnation He remained a king's son from His very childhood, but in the incarnation of Kṛṣṇa, although He was the son of a king, He at once left the shelter of His real father and mother (King Vasudeva and Queen Devakī) just after His appearance and went to the lap of Yaśodāmāyī to play the part of an ordinary cowherd boy in the blessed Vrajabhūmi, which is very sanctified because of His childhood pastimes. Therefore Lord Kṛṣṇa is more merciful than Lord Rāma. He was undoubtedly very kind to Kuntī's brother Vasudeva and the family. Had He not become the son of Vasudeva and Devakī, Queen Kuntī could not claim Him to be her nephew and thus address Kṛṣṇa in parental affection. But Nanda and Yaśodā are more fortunate because they could relish the Lord's childhood pastimes, which are more attractive than all other pastimes. There is no parallel to His childhood pastimes as exhibited at Vrajabhūmi, which are the prototypes of His eternal affairs in the original Kṛṣṇaloka described as the cintāmaṇi-dhāma in the Brahma-saṁhitā (Bs. 5.29).
(Srimad Bhagavatam----1:8:21----purport).

When Lord Kṛṣṇa was present in this material world to manifest His eternal pastimes of the transcendental realm of Goloka Vṛndāvana as an attraction for the people in general, He displayed a unique picture of subordination before His foster mother, Yaśodā. The Lord, in His naturally childish playful activities, used to spoil the stocked butter of motherYaśodā by breaking the pots and distributing the contents to His friends and playmates, including the celebrated monkeys of Vṛndāvana, who took advantage of the Lord's munificence.Mother Yaśodā saw this, and out of her pure love she wanted to make a show of punishment for her transcendental child. She took a rope and threatened the Lord that she would tie Him up, as is generally done in the ordinary household. Seeing the rope in the hands of mother Yaśodā, the Lord bowed down His head and began to weep just like a child, and tears rolled down His cheeks, washing off the black ointment smeared about His beautiful eyes. This picture of the Lord is adored by Kuntīdevī because she is conscious of the Lord's supreme position.
(Srimad Bhagavatam----1:8:31----purport).

Kuntī was conscious of the exalted position of Kṛṣṇa, whereas Yaśodā was not. Therefore Yaśodā's position was more exalted than Kuntī's. Mother Yaśodā got the Lord as her child, and the Lord made her forget altogether that her child was the Lord Himself. If mother Yaśodā had been conscious of the exalted position of the Lord, she would certainly have hesitated to punish the Lord. But she was made to forget this situation because the Lord wanted to make a complete gesture of childishness before the affectionate Yaśodā. This exchange of love between the mother and the son was performed in a natural way, and Kuntī, remembering the scene, was bewildered, and she could do nothing but praise the transcendental filial love. Indirectly mother Yaśodā is praised for her unique position of love, for she could control even the all-powerful Lord as her beloved child.
(Srimad Bhagavatam----1:8:31----purport).

When Kṛṣṇa was on the lap of His mother, the demon Pūtanā appeared before His mother and prayed to nurture the child in her lap. Mother Yaśodā agreed, and the child was transferred onto the lap of Pūtanā, who was in the garb of a respectable lady. Pūtanā wanted to kill the child by smearing poison on the nipple of her breast. But when everything was complete, the Lord sucked her breast along with her very air of life, and the demon's gigantic body, said to be as long as six miles, fell down.
(Srimad Bhagavatam----2:7:27----purport).

In His Vāmana incarnation He posed Himself as a dwarf brāhmaṇa, but when He took possession of His land, promised by Bali Mahārāja, He expanded His footstep to the top of the universe, extending over thousands and millions of miles. So it was not very difficult for Kṛṣṇa to perform a miracle by extending His bodily feature, but He had no desire to do it because of His deep filial love for His mother, Yaśodā. If Yaśodā had seen Kṛṣṇa in her lap extending six miles to cope with the she-demon Pūtanā, then the natural filial love of Yaśodāwould have been hurt because in that way Yaśodā would have come to know that her so-called son, Kṛṣṇa, was God Himself. And with the knowledge of the Godhood of Kṛṣṇa, Yaśodāmayīwould have lost the temper of her love for Kṛṣṇa as a natural mother. But as far as Lord Kṛṣṇa is concerned, He is God always, either as a child on the lap of His mother, or as the coverer of the universe, Vāmanadeva.
(Srimad Bhagavatam----2:7:27----purport).

So at the age of only three months He killed the Śakaṭāsura, who had remained hidden behind a cart in the house of Yaśodāmayī. And when He was crawling and was disturbing His mother from doing household affairs, the mother tied Him with a grinding pestle, but the naughty child dragged the pestle up to a pair of very high arjuna trees in the yard ofYaśodāmayī, and when the pestle was stuck between the pair of trees, they fell down with a horrible sound. When Yaśodāmayī came to see the happenings, she thought that her child had been saved from the falling trees by the mercy of the Lord, without knowing that the Lord Himself, crawling in her yard, had wreaked the havoc. So that is the way of reciprocation of love affairs between the Lord and His devotees. Yaśodāmayī wanted to have the Lord as her child, and the Lord played exactly like a child in her lap, but at the same time played the part of the Almighty Lord whenever it was so required. The beauty of such pastimes was that the Lord fulfilled everyone's desire.
(Srimad Bhagavatam----2:7:27----purport).

In the case of felling the gigantic arjuna trees, the Lord's mission was to deliver the two sons of Kuvera, who were condemned to become trees by the curse of Nārada, as well as to play like a crawling child in the yard of Yaśodā, who took transcendental pleasure in seeing such activities of the Lord in the very yard of her home.
(Srimad Bhagavatam----2:7:27----purport).

One day Lord Kṛṣṇa as the naughty child disturbed His mother Yaśodā, and she began to tie up the child with ropes just to punish Him. But no matter how much rope she used, she found it always insufficient. Thus she became fatigued, but in the meantime the Lord opened His mouth, and the affectionate mother saw within the mouth of her son all the universes situated together.
(Srimad Bhagavatam----2:7:30----purport).

Lord Kṛṣṇa's gentle behavior before His so-called superiors such as His father, grandfather and elder brother, His amiable behavior with His so-called wives, friends and contemporaries, His behavior as a child before His mother Yaśodā, and His naughty dealings with His young girl friends cannot bewilder a pure devotee like Uddhava. Others, who are not devotees, are bewildered by such behavior of the Lord, who acted just like a human being.
(Srimad Bhagavatam----3:2:22----purport).

Here is an example of the extreme mercy of the Lord, even to His enemy. It is said that a noble man accepts the good qualities of a person of doubtful character, just as one accepts nectar from a stock of poison. In His babyhood, He was administered deadly poison by Pūtanā, a she-demon who tried to kill the wonderful baby. And because she was a demon, it was impossible for her to know that the Supreme Lord, even though playing the part of a baby, was no one less than the same Supreme Personality of Godhead. His value as the Supreme Lord did not diminish upon His becoming a baby to please His devotee Yaśodā. The Lord may assume the form of a baby or a shape other than that of a human being, but it doesn't make the slightest difference; He is always the same Supreme.
(Srimad Bhagavatam----3:2:23----purport).

It is cited herein by the Lord that during his daytime Brahmā would see Him as Lord Śrī Kṛṣṇa. He would appreciate how the Lord expanded Himself into all the calves during His childhood at Vṛndāvana, he would know how Yaśodāmayī saw all the universes and planetary systems within the mouth of Kṛṣṇa during His playful childhood pastimes, and he would also see that there are many millions of Brahmās during the appearance of Lord Kṛṣṇa in Brahmā's daytime. But all these manifestations of the Lord, appearing everywhere in His eternal, transcendental forms, cannot be understood by anyone but the pure devotees, who are always engaged in devotional service to the Lord and are fully absorbed in the Lord.
(Srimad Bhagavatam----3:9:31----purport).

The difference between the pleasure and pain of this material world and that of the spiritual world is that in the spiritual world the effect is qualitatively absolute. Therefore one may feel sorry in the absolute world, but the manifestation of so-called pain is always full of bliss. For instance, once Lord Kṛṣṇa, in His childhood, was chastised by His mother, Yaśodā, and Lord Kṛṣṇa cried. But although He shed tears from His eyes, this is not to be considered a reaction of the mode of ignorance, for the incident was full of transcendental pleasure. When Kṛṣṇa was playing in so many ways, sometimes it appeared that He caused distress to the gopīs, but actually such dealings were full of transcendental bliss. That is the difference between the material and spiritual worlds.
(Srimad Bhagavatam----4:3:15----purport).

The Supreme Godhead is unconquerable; no one can conquer the Lord. But He voluntarily accepts subordination to the devotional qualities of His devotees. For example, Lord Kṛṣṇa accepted subordination to the control of mother Yaśodā because she was a great devotee. The Lord likes to be under the control of His devotees.
(Srimad Bhagavatam----4:12:42----purport).