M: "Once Vidyasagar said in a mood of pique: 'What is the use of calling on God? Just many people, the number of prisoners rose to about a hundred thousand. The commander of his army said to him: "Your Majesty, who will feed them? It is risky to keep them with us. It will be equally dangerous to release them. What shall I do?" Chenghiz Khan said: "That's true. What can be done? Well, have them killed." The order was accordingly given to cut them to pieces. Now, God saw this slaughter, didn't He? But He didn't stop it in any way. Therefore I don't need God, whether He exists or not. I don't derive any good from Him.'"
Sri Ramakrishna: "Is it possible to understand God's action and His motive? He creates, He preserves, and He destroys. Can we ever understand why He destroys? I say to the Divine Mother: 'O Mother, I do not need to understand. Please give me love for Thy Lotus Feet.' The aim of human life is to attain bhakti. As for other things, the Mother knows best. I have come to the garden to eat mangoes. What is the use of my calculating the number of trees, branches, and leaves? I only eat the mangoes; I don't need to know the number of trees and leaves.
Source: Gospel of Sri Ramakrishna