The highest knowledge is to know that we are surrounded by mystery.

The result of the voyage does not depend on the speed of the ship, but on whether or not it keeps a true course.

By respect for life we become religious in a way that is elementary, profound and alive. Impart as much as you can of your spiritual being to those who are on the road with you, and accept as something precious what comes back to you from them. In everyone's life, at some time, our inner fire goes out. It is then burst into flame by an encounter with another human being. We should all be thankful for those people who rekindle the inner spirit. - Albert Schweitzer

Ethical existence [is] the highest manifestation of spirituality.

Man can no longer live his life for himself alone. We realize that all life is valuable and that we are united to all this life. From this knowledge comes our spiritual relationship to the universe.

The thinking man must oppose all cruel customs no matter how deeply rooted in tradition or surrounded by a halo. We need a boundless ethics which will include the animals also. My life is full of meaning to me. The life around me must be full of significance to it. If I want others to respect my life, then I must respect the other life I see however strange it may be to mine. Ethics in our western world has hitherto been largely limited to the relation of man to man... but that is a limited ethics.

Do something good and someone might imitate it.