Your true nature is that of infinite spirit. The feeling of limitation is the work of the mind.
Ramana MaharshiIt is said that the heart is in the microcosm just as the orb of the sun in the macrocosm. The mind in Sahasrara is like the disc of the moon.
Ramana MaharshiIf the mind falls asleep, awaken it. Then if it starts wandering, make it quiet. If you reach the state where there is neither sleep nor movement of mind, stay still in that, the natural (real) state.
Ramana Maharshi