2 Quotes by Dr. Albert Schweitzer

The thinking man must oppose all cruel customs, no matter how deeply rooted in tradition and surrounded by a halo. When we have a choice, we must avoid bringing torment and injury into the life of another, even the lowliest creature; but to do so is to renounce our manhood and shoulder a guilt which nothing justifies.

It's not enough merely to exist. Every man has to seek in his own way to make his own self more noble and to relize his own true worth.