Peace is for the purification of one's mind. Power is for the growth of the community. Having established the community with power, one should then e… - Ramana Maharshi

The booklet Nan Yar? (Who am I?) elaborates on the "I" and Self-enquiry:

The Self That in which all these worlds seem to exist steadily, that of which all these worlds are a possession, that from which all these worlds rise, that for which all these exist, that by which all these worlds come into existence and that which is indeed all these - that alone is the existing reality. Let us cherish that Self, which is the reality, in the Heart.

If one watches whence the notion ‘I’ arises, the mind gets absorbed there; that is tapas. When a mantra is repeated, if one watches whence that mantra sound arises, the mind gets absorbed there; that is tapas.