"Without having love connection with Krishna, it is not possible to see Him. You may practice this hatha-yoga or gymnastic yoga for many, many births -- you cannot see Krishna. Krishna can be seen when you smear with love ointment in your eyes. Premanjana-cchurita-bhakti-vilocanena. And that is possible: bhakti, through bhakti."
(Srila Prabhupada lecture, Mayapur, March 12, 1976)