Mind is consciousness which has put on limitations. You are originally unlimited and perfect. Later you take on limitations and become the mind.
Ramana MaharshiHe whose pure mind turns inward and searches whence does this 'I' arise, knows the Self and merges in You, the Lord, as a river into the sea.
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