While doing the postures, your mind should be in half-consciousn ess, which does not mean sleep. It means silence, emptiness, space, which can then be filled with an acute awareness of the sensations given by the posture. You watch yourself from inside. It is a full silence.
B.K.S. IyengarIn Savasana or in meditation, the light of the eyes is drawn towards the lotus of the heart, so that the seat of the intelligence of the head is brought into contact with the seat of the intelligence of the heart, which is called the mind. Thus one passes from the individualistic state of consciousness to the universal state of consciousness. It is the merging of the intellect of the brain with the intellect of the soul.
B.K.S. IyengarIgnorance has no beginning, but it has an end. There is a beginning but no end to knowledge.
B.K.S. Iyengar