“But suppose someone says, ‘I can't see Krishna. How can I love Him?’ Chaitanya Mahaprabhu answers, ramya kachid upasann vrajavadhu-vargena ya kalpita. If you want to learn the process of worshiping Krishna, of loving Krishna, just try to follow in the footsteps of the gopis, the cowherd girls of Vrindavana.” (Shrila Prabhupada, Quest for Enlightenment, Ch 7c)