Shakespeare's Sonnets: Thy glass will show thee how thy beauties wear

Thy glass will show thee how thy beauties wear,Thy dial how thy precious minutes waste.The vacant leaves thy mind's imprint will bear,And of this book, this learning may'st thou taste.The wrinkles which thy glass will truly showOf mouthèd graves will give thee memory.Thou by thy dial's shady stealth may'st knowTime's thievish progress to eternity.Look what thy memory cannot contain,Commit to these waste blacks, and thou shalt findThose children nurs't, deliver'd from thy brain,To take a new acquaintance of thy mind. These offices, so oft as thou wilt look, Shall profit thee and much enrich thy book.