Attachment for the Supreme can be increased by practicing devotional service, inquiring about the Supreme Personality of Godhead, applying bhakti-yoga in life, worshiping the Yogeśvara, the Supreme Personality of Godhead, and by hearing and chanting about the glories of the Supreme Personality of Godhead. These actions are pious in themselves.
The word yogeśvara is applicable to both the Supreme Personality of Godhead, Kṛṣṇa, and His devotees also. In Bhagavad-gītā this word occurs in two places. In the Eighteenth Chapter (B.G.18:78), Kṛṣṇa is described as the Supreme Personality of Godhead, Hari, who is the master of all mystic power (yatra yogeśvaraḥ kṛṣṇaḥ). Yogeśvara is also described at the end of the Sixth Chapter (B.G.6:47): sa me yuktatamo mataḥ. This yuktatama indicates the topmost of all yogīs—the devotees, who can also be called yogeśvara. In this verse, yogeśvara-upāsanā means to render service to a pure devotee. Thus Narottama dāsa Ṭhākura says, chāḍiyā vaiṣṇava-sevā nistāra pāyeche kebā: without serving a pure devotee, one cannot advance in spiritual life.
(Srimad Bhagavatam------4:22:22------translation and purport).

The word sāṅkhya-yogeśvarāya is also significant herein, for Kṛṣṇa is described in Bhagavad-gītā as Yogeśvara, the master of all mystic powers. Without possessing inconceivable mystic powers, one cannot be accepted as God. In this age of Kali, those who have a little fragmental portion of mystic power claim to be God, but such pseudo Gods can only be accepted as fools, for only Kṛṣṇa is the Supreme Person who possesses all mystic and yogic perfections. The sāṅkhya-yoga system popular at the present moment was propounded by the atheist Kapila, but the original sāṅkhya-yoga system was propounded by an incarnation of Kṛṣṇa also named Kapila, the son of Devahūti. Similarly, Dattātreya, another incarnation of Kṛṣṇa, also explained the sāṅkhya-yoga system. Thus Kṛṣṇa is the origin of all sāṅkhya-yoga systems and mystic yoga powers.
(Srimad Bhagavatam------4:24:42------purport).

There is a Bengali saying which describes that someone is so powerful that he can make the night day and the day night. That saying is current because of the prowess of Priyavrata. His activities demonstrate how powerful he became by worshiping the Supreme Personality of Godhead. Lord Kṛṣṇa is known as Yogeśvara, the master of all mystic powers. In Bhagavad-gītā (B.G.18:78) it is said wherever there is the master of all mystic powers (yatra yogeśvaraḥ kṛṣṇaḥ), victory, fortune and all other opulences are present. Devotional service is so powerful. When a devotee achieves what he wants to accomplish, it is not by his own mystic power but by the grace of the master of mystic power. Lord Kṛṣṇa: by His grace, a devotee can accomplish wonderful things unimaginable even to the most powerful scientist.
(Srimad Bhagavatam------5:1:32------purport).

Kṛṣṇa is known as Yogeśvara, as stated in the last portion of the Bhagavad-gītā. Yogeśvaro hariḥ: all mystic powers are under His control. In our experience we can see many human beings who have yogic mystic power and who sometimes perform very wonderful acts, but Kṛṣṇa is understood to be the master of all mystic power. Therefore, when He saw that His horses were hesitant to proceed into the darkness, He immediately released His disc, known as the Sudarśana cakra, which illuminated the sky a thousand times brighter than sunlight. The darkness of the covering of the universe is also a creation of Kṛṣṇa's, and the Sudarśana cakra is Kṛṣṇa's constant companion. Thus He penetrated the darkness by keeping the Sudarśana cakra before Him. Śrīmad-Bhāgavatam states that the Sudarśana cakra penetrated the darkness just as an arrow released from the Śārṅga bow of Lord Rāmacandra penetrated the army of Rāvaṇa. Su means "very nice," and darśana means "observation"; by the grace of Lord Kṛṣṇa's disc, Sudarśana, everything can be seen very nicely, and nothing can remain in darkness. Thus Lord Kṛṣṇa and Arjuna crossed over the great region of darkness covering the material universes.
(Krsna Book).