"True happiness is... to enjoy the present, without anxious dependence upon the future." – Seneca, Letters from a Stoic
"It's not what happens to you, but how you react to it that matters." – Epictetus, Discourses
"He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has." - Epictetus
"The impediment to action advances action. What stands in the way becomes the way." – Marcus Aurelius, Meditations