Do not let your fire go out, spark by irreplaceable spark, in the hopeless swamps of the approximate, the not-quite, the not-yet, the not-at-all. Do not let the hero in your soul perish, in lonely frustration for the life you deserved, but have never been able to reach. Check your road and the nature of your battle. The world you desired can be won, it exists, it is real, it is possible, it is yours.

Ayn Rand

Elsewhere:

Let there be light!--In the beginning there was nothing. So, God came down from the Heavens and said, 'Let there be light!' And there was light. There was still nothing, but you could see it a whole lot [...]