When I consider everything that grows <br />Holds in perfection but a little moment, <br />That this huge stage presenteth nought but shows <br />Whereon the stars in secret influence comment; <br />When I perceive that men as plants increase, <br />Cheered and check'd even by the selfsame sky, <br />Vaunt in their youthful sap, at height decrease, <br />And wear their brave state out of memory; <br />Then the conceit of this inconstant stay <br />Sets you most rich in youth before my sight, <br />Where wasteful Time debateth with Decay <br />To change your day of youth to sullied night; <br />And all in war with Time for love of you, <br />As he takes from you, I engraft you new.<br /><br />William Shakespeare<br /><br />http://www.poemhunter.com/poem/sonnet-xv-when-i-consider-everything-that-grows/