Ships that pass in the night, and speak each other in passing,
Only a signal shown, and a distant voice in the darkness;
So on the ocean of life, we pass and speak one another,
Only a look and a voice, then darkness again and a silence.
-- Henry Wadsworth Longfellow, Tales of a Wayside Inn.

Let me not to the marriage of true minds
Admit impediments; Love is not love
Which alters when it alteration finds
Or bends with the remover to remove
O no, it is an ever-fixed mark
That looks upon tempest and is never shaken
-- William Shakespeare