I don't think of all the misery, but of the beauty that still remains....My advice is: Go outside, to the fields, enjoy nature and the sunshine, go out and try to recapture happiness in yourself and in God. Think of all the beauty that's still left in and around you and be happy!
I have found that all ugly things are made by those who strive to make something beautiful, and that all beautiful things are made by those who strive to make something useful.
If your inner being changes, your whole outer life will be totally different. It will have a different fragrance, a different beauty, a different grace. And when your inner being is changed and becomes a flame of light, you will become a light unto others too. You will become a beckoning light, a great herald of a new dawn. Your very presence will trigger revolutions in other people's lives.
I can only note that the past is beautiful because one never realises an emotion at the time. It expands later, and thus we don't have complete emotions about the present, only about the past.
There are two kinds of beauty; there is a beauty which God gives at birth, and which withers as a flower. And there is a beauty which God grants when by His grace men are born again. That kind of beauty never vanishes but blooms eternally.