When, hearing the name of Hari or Rama once, you shed tears and your hair stands on end, then you may know for certain that you do not have to perform such devotions as the sandhya any more. Then only will you have a right to renounce rituals; or rather, rituals will drop away of themselves. Then it will be enough if you repeat only the name of Rama or Hari, or even simply Om.” Continuing, he said, “The sandhya merges in the Gayatri, and the Gayatri merges in Om.
Sri Ramakrishna
The Gospel of Sri Ramakrishna, February 1882