Happiness is always a by-product. It is probably a matter of temperament, and for anything I know it may be glandular. But it is not something that can be demanded from life, and if you are not happy you had better stop worrying about it and see what treasures you can pluck from your own brand of unhappiness.
~Robertson Davies
Against Him those women sin who torment their skin with potions, stain their cheeks with rouge and extend the line of their eyes with black coloring. Doubtless they are dissatisfied with God's plastic skill. In their own persons they convict and censure the Artificer of all things.
~Tertullian
Irons rusts from disuse, stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind. ~
Leonardo da Vinci,
Notebooks, 1508