"Those who fix their minds on Me and always engage in My devotion with steadfast faith, I consider them to be the best yogis. But those who worship the formless aspect of the Absolute Truth—the imperishable, the indefinable, the unmanifest, the all-pervading, the unthinkable, the unchanging, the eternal, and the immoveable—by restraining their senses and being even-minded everywhere, such persons, engaged in the welfare of all beings, also attain Me."
Bhagavad Gita 12.2-4