Memory #7, Books on Books #3, Time #15, Shakespeare #7

Thy glasse will shew thee how thy beauties were,
Thy dyall how thy pretious mynuits waste,
The vacant leaues thy mindes imprint will beare,
And of this booke, this learning maist thou taste.
The wrinckles which thy glasse will truly show,
Of mouthed graues will giue thee memorie,
Thou by thy dyals shady stealth maist know,
Times theeuish progresse to eternitie.
Looke what thy memorie cannot containe,
Commit to these waste blacks, and thou shalt finde
Those children nurst, deliuerd from thy braine,
To take a new acquaintance of thy minde.
These offices, so oft as thou wilt looke,
Shall profit thee, and much inrich thy booke.

William Shakespeare, Sonnet LXXVII