L'chaim!

Ethics cannot be based upon our obligations toward [people], but they are complete and natural only when we feel this Reverence for Life and the desire to have compassion for and to help all creatures insofar as it is in our power. I think that this ethic will become more and more recognized because of its great naturalness and because it is the foundation of a true humanism toward which we must strive if our culture is to become truly ethical.
~ Albert Schweitzer

Ethics, too, are nothing but reverence for life. This is what gives me the fundamental principle of morality, namely, that good consists in maintaining, promoting, and enhancing life, and that destroying, injuring, and limiting life are evil.
~ Albert Schweitzer, Civilization and Ethics, 1949

Reverence for Life affords me my fundamental principle of morality, namely, that good consists in maintaining, assisting, and enhancing life and that to destroy, harm, or to hinder life is evil. Affirmation of the world -- that is affirmation of the will to live, which appears in phenomenal forms all around me -- is only possible for me in that I give myself out for other life.
~ Albert Schweitzer

How is one to live a moral and compassionate existence when one is fully aware of the blood, the horror inherent in life, when one finds darkness not only in one's culture but within oneself? If there is a stage at which an individual life becomes truly adult, it must be when one grasps the irony in its unfolding and accepts responsibility for a life lived in the midst of such paradox. One must live in the middle of contradiction, because if all contradiction were eliminated at once life would collapse. There are simply no answers to some of the great pressing questions. You continue to live them out, making your life a worthy expression of leaning into the light.
~ Barry Lopez, Arctic Dreams

The same stream of life that runs through my veins night and day runs through the world and dances in rhythmic measures. It is the same life that shoots in joy through the dust of the earth in numberless blades of grass and breaks into tumultuous waves of leaves and flowers. It is the same life that is rocked in the ocean-cradle of birth and of death, in ebb and in flow. I feel my limbs are made glorious by the touch of this world of life. And my pride is from the life-throb of ages dancing in my blood this moment. Rabindranath Tagore, from Gitanjali

For everything that lives is holy, life delights in life.
~ William Blake

Source: Wisdom Quotes: Life