"Everyone says, "Love God." Men do not know what it is to love; if they did, they would not talk so glibly about it. Every man says he can love, and then, in no time, finds out that there is no love in his nature. Every woman says she can love and soon finds out that she cannot. The world is full of the talk of love, but it is hard to love. Where is love? How do you know that there is love? The first test of love is that it knows no bargaining. So long as you see a man love another only to get something from him, you know that that is not love; it is shopkeeping. Wherever there is any question of buying and selling, it is not love. So, when a man prays to God, "Give me this, and give me that", it is not love. How can it be? I offer you a prayer, and you give me something in return; that is what it is, mere shopkeeping."

- Swami Vivekananda, "Bhakti or Devotion" (Bhakti Yoga, February 9, 1896, Madison Square Garden Concert Hall, NYC), Complete Works: Vol 2