"This My form, which you have seen, is very difficult to see. Even the gods always desire to see this form. It is not possible for any one to see Me, as you have seen Me, whether by Vedas, or by austerity, or by charity, or by Yajnās. O Arjuna! only by exclusive devotion, is it possible to thus acquire knowledge of Me, and O Parantapa! to enter Me essentially."
January 1, 1970
https://en.wikiquote.org/wiki/Bhagavad_Gita