It is better to do thine own duty, however lacking in merit, than to do that of another, even though efficiently. It is better to die doing ones own duty, for to do the duty of another is fraught with danger. – Bhagavad Gita
You will never find that life for which you are looking. When the gods created man they allotted to him death, but life they retained in their own keeping. – The Epic of Gilgamesh