something within watching all the mental activities but separate from them, just as you can watch things going on outside in the street, then that is the separation of Purusha from mental Prakriti.Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 1
Fragment ID: 13623
The only way [to separate oneself from mental activities such as reading] is to separate the Prakriti and Purusha. When you feel something within watching all the mental activities but separate from them, just as you can watch things going on outside in the street, then that is the separation of Purusha from mental Prakriti.