Herodotus wrote in "The Histories": For many very wealthy men are not happy, while many who have only a moderate living are fortunate. In truth the very rich man who is not happy has two advantages only compared with the poor man who is fortunate, whereas this latter has many as compared with the rich man who is not happy. The rich man is able better to fulfill his desire, and also to endure a great calamity if it fall upon him; whereas the other has these advantages over him-- he is not indeed able equally with the rich man to endure a calamity or to fulfill his desire, but these his good fortune keeps away from him, while he is sound of limb, free from disease, untouched by suffering, the father of fair children and handsome himself. If in addition to this he shall end his life well, he is worthy to be called that which you seekest, namely a happy man; but before he comes to his end it is well to hold back and not call him happy yet but only fortunate.
Tennessee Williams wrote in "Camino Real": There's a time for departure, even if there's no certain place to go.
The great Heraclitus said: There is nothing permanent except change.