A sense of contentment is crucial to being happy. Physical health, material wealth and friends contribute to this, but contentment governs our relations with them all.
There is no health in those who are displeased by an element in Your creation, just as there was none in me when I was displeased by many things You had made. Because my soul didn't dare to say that my God displeased me, it refused to attribute to You whatever was displeasing.
Not contentment, but more power; not peace at any price, but war; not virtue, but efficiency (virtue in the Renaissance sense, virtu , virtue free of moral acid).
Contentment is never the outcome of fulfillment, of achievement, or of the possession of things; it is not born of action or inaction. It comes with the fullness of what is, not in the alteration of it.
For unless one is able to live fully in the present, the future is a hoax. There is no point whatever in making plans for a future which you will never be able to enjoy. When your plans mature, you will still be living for some other future beyond. You will never, never be able to sit back with full contentment and say, "Now, I've arrived!" Your entire education has deprived you of this capacity because it was preparing you for the future, instead of showing you how to be alive now.
We do not want joy and anger to neutralize each other and produce a surly contentment; we want a fiercer delight and a fiercer discontent. We have to feel the universe at once as an ogre's castle, to be stormed, and yet as our own cottage, to which we can return to at evening.