Nietzsche wrote

We are two ships each of which has its goal and course; our paths may cross and we may celebrate a feast together, as we did—and then the good ships rested so quietly in one harbor and one sunshine that it may have looked as if they had reached their goal and as if they had one goal. But then the almighty force of our tasks drove us apart again into different seas and sunny zones, and perhaps we shall never see one another again,—perhaps we shall meet again but fail to recognize each other: our exposure to different seas and suns has changed us!