John Milton - Sonnet 21

XXI

Cyriac, whose grandsire on the royal bench
Of British Themis, with no mean applause
Pronounced and in his volumes taught our laws,
Which others at their bar so often wrench;
Today deep thoughts resolve with me to drench
In mirth, that after no repenting draws;
Let Euclid rest and Archimedes pause,
And what the Swede intends, and what the French.
To measure life learn thou betimes, and know
Toward solid good what leads the nearest way;
For other things mild Heav'n a time ordains,
And disapproves that care, though wise in show,
That with superfluous burden loads the day,
And, when God sends a cheerful hour, refrains.

John Milton

http://www.poemhunter.com/poem/sonnet-21-2/