మానసిక శౌచం- స్వామి శివానంద బోధ

Virtues like truthfulness, earnestness and industry are the best sources of mental power. Purity leads to wisdom and immortality. Purity is of two kinds, internal or mental and external or physical. Mental purity is more important. Physical purity is also needed. With the establishment of internal mental purity, cheerfulness of mind, one-pointed mind, conquest of Indriyas and fitness for the realization of the Self are obtained.

- Swami Sivananda