Man has four births. His first birth takes place from his mother’s womb. He gets a second life when he is initiated into the Gayathri Manthra. His third birth occurs when he studies the Vedas. He becomes a Brahmin when he recognizes the principle of Brahman. This is his fourth birth. One becomes a Brahmin not merely by birth, but by knowing the nature of Brahman. For this chanting of Gayathri Manthra is every essential.
(From : Sai Veda, The Word of God, sayings of Bhagavan Sri Sathya Sai Baba)