I have read in books that we are called 'caged birds'. I cannot speak for others, but I had so much in this cage of mine that there was not room for it in the universe- at least that is what I then felt.
When you have shot one bird flying you have shot all birds flying. They are all different and they fly in different ways but the sensation is the same and the last one is as good as the first.
Live in the world like a waterfowl. The water clings to the bird, but the bird shakes it off. Live in the world like a mudfish. The fish lives in the mud, but its skin is always bright and shiny.
Whoever is related to me in the height of his aspirations will experience veritable ecstasies of learning; for I come from heights that no bird ever reached in its flight, I know abysses into which no foot ever strayed.