In plain words
So you need not enquire into this separately. This is precisely the inner meaning of the teaching "neti neti" in Vedānta. The "I" is in all. The very "I" that is in me is in you. The very "I" that is in you is in her. The very "I" that is in you is in him too. If we recognise well this feeling of the one Ātma, there will be no room for such disturbances. Whomever one hurts, one has hurt none but oneself. Whomever one reviles, one becomes one who has reviled oneself. This is it: when Śaṅkarācārya entered the holy city of Kāśī, an outcaste came near, and Śaṅkarācārya said, "Hey! Away, away." He said, "Whom are you telling to keep away? The body? The body is inert. This inert body has no authority at all to tell an inert body to keep away. Both are inert. There is no way at all for the inert to speak to the inert. Or are you telling the principle of the Ātma to keep away! What is in you is the Ātma itself, what is in me is the Ātma itself. You are telling the "I" itself to keep away." So saying, in this way an argument went on about the body and the Ātma. Then Śaṅkarācārya recognised it well and made a full prostration, knowing that the one who has recognised this true principle of the Ātma, the feeling of the one Ātma alone, is Īśvara Himself and none other. Then and there the outcaste revealed the form of Śaṅkara, and Śaṅkara Himself, in person, taught Śaṅkarācārya: "To rid you of the bad feelings in you, I took on this form and came in this way." So no one can say in what form, in what place, at what time or where God will … appear, to rid men of the bad deeds, bad feelings and bad qualities in them. So first of all, as far as possible, without letting bad qualities into us, by good qualities and by good conduct, our life
This is true sādhana. If people sit down saying only japa, japa, and do japa while letting bad qualities grow, for whose sake is this japa done? This is merely artificial japa. What is true must be done in the heart. People sit for dhyāna. In dhyāna they sit without moving or stirring, like a statue.