Nowadays there is an attempt in the West to popularize Vedanta without stressing purity of mind. Many people in the West feel drawn to Advaita because of its loftiness and logical beauty. But intellectual appreciation alone is not enough. Many people think that Advaita does not need the practice of brahmacharya and other virtues. This is not true. On the contrary, it demands the strictest control of mind and senses.

A jivanmukta or a liberated man may not pay much attention to social conventions but never does he - nor can he - violate the fundamental virtues like chastity. These have become his second nature. In the Vedantasara we find a passage that says, 'if a man who has known the truth of Oneness acts according to his whims, then where is the difference between a knower of Truth and a dog as regards eating impure stuff??'

Reference: Meditation and Spiritual Life by Swami Yatiswarananda (p.212)