Punishment meted out by the Supreme Personality of Godhead is accepted by the devotee as the greatest mercy.
tat te 'nukampāṁ susamīkṣamāṇo
bhuñjāna evātma-kṛtaṁ vipākam
hṛd-vāg-vapurbhir vidadhan namas te
jīveta yo mukti-pade sa dāya-bhāk
"One who seeks Your compassion and thus tolerates all kinds of adverse conditions due to the karma of his past deeds, who engages always in Your devotional service with his mind, words and body, and who always offers obeisances to You is certainly a bona fide candidate for liberation."
(Srimad Bhagavatam-----8:22:4-----purport).

If one worships the Supreme Personality of Godhead, however, the Lord will never offer him such condemned benedictions. On the contrary, it is said in the Śrīmad-Bhāgavatam (10.88.8), yasyāham anugṛhnāmi hariṣye tad-dhanaṁ śanaiḥ. If one is too materialistic but at the same time wants to be a servant of the Supreme Lord, the Lord, because of His supreme compassion for the devotee, takes away all his material opulences and obliges him to be a pure devotee of the Lord.
(Srimad Bhagavatam-----7:10:5-----purport).

Therefore, as Kṛṣṇa is always compassionate to the fallen souls, His servants, the devotees of Lord Kṛṣṇa, are also interested in educating the entire populace in Kṛṣṇa consciousness. The mistake of materialistic life is understood by devotees, and therefore they smile upon it, considering it insignificant. Out of compassion, however, such devotees preach the gospel of Bhagavad-gītā all over the world.
(Srimad Bhagavatam-----7:5:55-----purport).

A Kṛṣṇa conscious person should free himself from the clutches of māyā, and he should also be compassionate to all others suffering in those clutches. The activities of the Kṛṣṇa consciousness movement are meant not only for oneself but for others also. This is the perfection of Kṛṣṇa consciousness. One who is interested in his own salvation is not as advanced in Kṛṣṇa consciousness as one who feels compassion for others and who therefore propagates the Kṛṣṇa consciousness movement. Such an advanced devotee will never fall down, for Kṛṣṇa will give him special protection.
(Srimad Bhagavatam-----6:2:36:37-----purport).

One who actually assimilated the essence of the Vedas can preach the truth. He is compassionate to conditioned souls who are suffering the threefold miseries of this conditional world due to their not being Kṛṣṇa conscious.
(Srimad Bhagavatam-----5:5:24-----purport).

The form of the Lord known as arcā-vigraha is an expansion of His unlimited potencies. When the Lord is gradually satisfied with the service of a devotee, in due course of time He accepts the devotee as one of His many unalloyed servants. By nature, the Lord is very compassionate; therefore the service of neophyte devotees is accepted by the Lord. As confirmed in Bhagavad-gītā (9.26):
patraṁ puṣpaṁ phalaṁ toyaṁ
yo me bhaktyā prayacchati
tad ahaṁ bhakty-upahṛtam
aśnāmi prayatātmanaḥ
"If one offers Me with love and devotion a leaf, a flower, fruit or water, I will accept it." The devotee offers eatables in the form of vegetables, fruits, leaves and water to the arcā-vigraha. The Lord, being bhakta-vatsala, compassionate upon His devotees, accepts these offerings.
(Srimad Bhagavatam-----4:30:28-----purport).

The word anukampinā is significant; the Lord is so compassionate upon the living entities that He comes Himself into this world in order to benefit fallen souls.
yadā yadā hi dharmasya
glānir bhavati bhārata
abhyutthānam adharmasya
tadātmānaṁ sṛjāmy aham
"Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion—at that time I descend Myself." (Bg. 4.7) Thus it is out of compassion that the Lord appears in His different forms. Lord Śrī Kṛṣṇa appeared on this planet out of compassion for fallen souls; Lord Buddha appeared out of compassion for the poor animals who were being killed by the demons; Lord Nṛsiṁhadeva appeared out of compassion for Prahlāda Mahārāja. The conclusion is that the Lord is so compassionate upon the fallen souls within this material world that He comes Himself or sends His devotees and His servants to fulfill His desire to have all the fallen souls come back home, back to Godhead.
(Srimad Bhagavatam-----4:22:42-----purport).

Kṛṣṇa is therefore known as para-duḥkha-duḥkhī kṛpāmbudhiḥ, or one who is compassionate toward others' suffering and who is an ocean of mercy. Like Prahlāda Mahārāja, all pure devotees of the Lord come to this material world with full compassion to deliver the sinful. They undergo all kinds of tribulations, suffering them with tolerance, because that is another qualification of a Vaiṣṇava, who tries to deliver all sinful persons from the hellish conditions of material existence. Vaiṣṇavas are therefore offered the following prayer:
vāñchā-kalpatarubhyaś ca
kṛpā-sindhubhya eva ca
patitānāṁ pāvanebhyo
vaiṣṇavebhyo namo namaḥ
I offer my respectful obeisances unto all the Vaiṣṇava devotees of the Lord. They can fulfill the desires of everyone, just like desire trees, and they are full of compassion for the fallen souls. The chief concern of a Vaiṣṇava is to deliver the fallen souls.
(Srimad Bhagavatam-----4:21:47-----purport).

Every man should act like this: when he meets a person more qualified than himself, he should be very pleased; when he meets someone less qualified than himself, he should be compassionate toward him; and when he meets someone equal to himself, he should make friendship with him. In this way one is never affected by the threefold miseries of this material world.
(Srimad Bhagavatam-----4:8:34-----translation).

A devotee should worship the Supreme Lord, be friendly to persons who are on the same level and be compassionate to the ignorant. One should exhibit his compassion for ignorant living entities by distributing prasāda. Distribution of prasāda to the ignorant masses of people is essential for persons who make offerings to the Personality of Godhead.
(Srimad Bhagavatam-----3:29:24-----purport).

A devotee shows compassion to those poor souls who are wanting in spiritual knowledge by enlightening them in order to elevate them to Kṛṣṇa consciousness. That is one of the duties of a devotee. He should also make friendship with persons who are on an equal level with himself or who have the same understanding that he does. For a devotee, there is no point in making friendships with ordinary persons; he should make friendship with other devotees so that by discussing among themselves, they may elevate one another on the path of spiritual understanding. This is called iṣṭa-goṣṭhī.
(Srimad Bhagavatam-----3:29:17-----purport).

Whenever there is disease in any part of the body, the whole body takes care of the ailing part. Similarly, a devotee's oneness is manifested in His compassion for all conditioned souls. Bhagavad-gītā (5.18) says, paṇḍitāḥ sama-darśinaḥ: those who are learned see everyone's conditional life equally. Devotees are compassionate to every conditioned soul, and therefore they are known as apārakya-buddhi. Because devotees are learned and know that every living entity is part and parcel of the Supreme Lord, they preach Kṛṣṇa consciousness to everyone so that everyone may be happy. If a particular part of the body is diseased, the whole attention of the body goes to that part. Similarly, devotees care for any person who is forgetful of Kṛṣṇa and therefore in material consciousness. The equal vision of the devotee is that he works to get all living entities back home, back to Godhead.
(Srimad Bhagavatam----4:7:53-----purport).