I am an old man and have known a great many troubles, but most of them never happened.Mark Twain
Worrying is nothing more than unnecessary suffering and only weakens us emotionally.
Say to yourself:
„If there is anything I can do right now about the future, I will do it. Then I‘m going to leave it alone and enjoy life with each single moment. My life experience has taught me that I can only deal with things when they happen, and in that moment I will always have the energy and the resources to handle them.“
Loosely taken from „The Way to Love: Meditations for Life“ by Anthony de Mello