Opportunity
He who bends to himself a joy
Does the wingèd life destroy;
But he who kisses the joy as it flies
Lives in eternity’s sunrise.
If you trap the moment before it is ripe,
The tears of repentance you ’ll certainly wipe;
But if once you let the ripe moment go,
You can never wipe off the tears of woe.
Source: Bartleby.com (archived copy)