There is nothing I can give you which you have not; but there is much I cannot give that you can take. No heaven can come to us unless our hearts find rest in today. Take heaven! No peace lies in the future which is not hidden in this present instant. Take peace! The gloom of the world is but a shadow; behind it, yet within reach, is joy. Take joy! There is radiance and glory in the darkness, could we but see; and to see, we have only to look. I beseech you to look. Life is so generous a giver, but we, judging its gifts by their covering, cast them away as ugly, or heavy, or hard. Remove the covering, and you will find beneath it a living splendor, woven of love, by wisdom, with power.
Source: letter to Countess Allagia Aldobrandeschi, Christmas Eve, 1513