Words have no power to impress the mind without the exquisite horror of their reality.

Knowledge will forever govern ignorance and a people who mean to be their own governors must arm themselves with the power which knowledge gives.

What we call Man's power over Nature turns out to be a power exercised by some men over other men with Nature as its instrument.

You have power over your mind - not outside events. Realize this, and you will find strength.

Respect your efforts, respect yourself. Self-respect leads to self-discipline. When you have both firmly under your belt, that's real power.