In plain words
Everything lies within man himself. A Divinity that is not in man is nowhere else to be seen by us. Man is the abode of all powers; man is the abode of all divine qualities. Not to recognise such a man as man, and to behave as a demon: this is not right. That is why the brahma-yajña goes on without ceasing in such a man. At all times and in all states it goes on chanting this Name and making its offerings. It goes on uttering svāhā without end. That svāhā is the form of the breath. That is So-ham. So-ham. The So in this breath makes its offering with the divine mantra "I myself am God, I myself am God" itself. So the Vedas are not merely in the form of a book; they lie within man in the form of feeling.
Here is another example of this. In the yajña they invoke Indra again and again. Who is this Indra? He is not some special deity. He is the lord of the senses. Our own mind is Indra. This Indra has another name too: Puruhūta. Puru means calling again and again. Hūta means invoking; since he is the one who gets himself invoked many times over, he has the other name Puruhūta. This Indra has yet another name. Rudra. The mind that is lord of the senses is Indra; the principle that has brought the senses under its control and pervades everywhere is named Rudra. In short, the mind, Indra and Rudra are one and the same. When it performs different karmas it bears different names. A small example. Let us take a small example from the worldly sphere. There is a brahmin. He performs pūjā in a temple. They call him the priest brahmin. In another place he reads the almanac; they call him the almanac brahmin. In another place he cooks; they call him the cook brahmin. In another place he teaches. There they call him the teacher brahmin. These names came from these jobs, but all of them are brahmins. In the same way, mind, Indra and Rudra too got these names according to the karmas they do. So our good and bad too take shape according to the Divinity that comes forth in the form of action. So, for everything, karma is what matters most. That is why they gave the karma-kāṇḍa the chief place in the Veda. In this very karma-kāṇḍa the Veda has shown the divine human form as well.
In the house of Daśaratha four boys, Rāma, Lakṣmaṇa, Bharata and Śatrughna, are always moving about.