Two birds sit on one tree: one eats the fruit and grieves, the other only watches — and the first, looking up, is freed.
Dialogues in this Upanishad
The Two Knowledges — A great householder asks: what is it, knowing which, all else is known? Angiras answers by splitting knowledge in two — the lower, of facts, and the higher, of the imperishable.
Two Birds on One Tree — Two birds, inseparable friends, perch on one tree. One eats the fruit, sweet and bitter, and grieves. The other only watches — and the first, looking up at it, is freed.
