Sri Ramakrishna : "Through restlessness — the restlessness a child feels for his mother. The child feels bewildered when he is separated from his mother, and weeps longingly for her. If a man can weep like that for God he can even see Him. "At the approach of dawn the eastern horizon becomes red. Then one knows it will soon be sunrise. Likewise, if you see a person restless for God, you can be pretty certain that he hasn't long to wait for His vision. "A disciple asked his teacher, 'Sir, please tell me how I can see God.' Come with me,' said the guru, 'and I shall show you.' He took the disciple to a lake, and both of them got into the water. Suddenly the teacher pressed the disciple's head under the water. After a few moments he released him and the disciple raised his head and stood up. The guru asked him, 'How did you feel?' The disciple said, 'Oh! I thought I should die; I was panting for breath.' The teacher said, 'When you feel like that for God, then you will know you haven't long to wait for His vision Source: from book "Gospel of Sri Ramakrishna"