Robert Crawford - Natural Gifts.

The gifts o' the gods; not all men have them, ay,
And some indeed that have them know it not;
And some that have them not, deem that they have,
And there's the mischief: it is this that makes
So many failures, tempts men to betray
Their proper selves, and on a false surmise
Of what they are or will be, lures them to
Their own undoing; as pirate lights decoy
Unwary mariners to ruin on
A monstrous shore.

Robert Crawford

http://www.poemhunter.com/poem/natural-gifts/