Let knowledge be guessed by the sign of equality to all beings. - Ramana Maharshi

Eating, bathing, going to the toilet, talking, thinking, and many other activities related to the body are all work. How is it that the performance of one particular act is alone (considered) work? To be still is to be always engaged in work. To be silent is to be always talking.

13. It is said that the heart is in the microcosm just as the orb of the sun in the macrocosm. The mind in Sahasrara is like the disc of the moon.

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.