A. E. Housman: Think no more, lad; laugh, be jolly:

Think no more, lad; laugh, be jolly:  Why should men make haste to die? Empty heads and tongues a-talking Make the rough road easy walking, And the feather pate of folly  Bears the falling sky.
Oh, 'tis jesting, dancing, drinking  Spins the heavy world around. If young hearts were not so clever, Oh, they would be young for ever: Think no more; 'tis only thinking  Lays lads underground.