Bhagavad Gita 6.47

6.47 And among all the Yogis he who, full of faith and with his inner self merged in Me, worships Me is deemed by Me to be the most devout.

And of all yogīs, the one with great faith who always abides in Me, thinks of Me within himself and renders transcendental loving service to Me – he is the most intimately united with Me in yoga and is the highest of all. That is My opinion.