Inner harmony is a prolific source of power; it breeds strength. Things that you think you are unable to bear, you can not only bear but change and improve. To you is given the power that can move the world and alter the face of fate despite inharmonious outer circumstances. Cervantes wrote his famous Don Quixote in a prison cell, as did Sir Walter Raleigh his history.

Harmony conserves mental energy; disharmony dissipates it. If the mind is a battleground of thoughts fighting against thoughts, without decision, without concord, enough energy is consumed that could instead have rebuilt life ideally. Maintain harmony of thought, and more power will be granted unto you; allow opposing forces to pull at you from different directions, and progress is reduced almost to zero. Be wise and use constructively your God-given energy, both mentally and physically.

- Journey to Self-Realization - Collected Talks and Essays. Volume 3 by Paramahansa Yogananda