George Gascoigne - Sonnet VII

No haste but good, where wisdom makes the way,
For proof whereof behold the simple snail
(Who sees the soldier's carcass cast away,
With hot assault the Castle to assail)
By line and leisure climbs the wall,
And wins the turret's top more cunningly
Than doughty Dick, who lost his life and all
With hoisting up his head so hastily.
The swiftest bitch brings forth the blindest whelps;
The hottest Fevers coldest cramps ensue;
The nakedest need hath ever latest helps.
With Nevil then I find this proverb true,
That Haste makes waste, and therefore still I say,
No haste but good, where wisdom makes the way.

George Gascoigne

http://www.poemhunter.com/poem/sonnet-vii-11/