Whilst doing one learns.
More Dutch Proverbs:
The candle that goes before gives the best light.Dutch
When the dog is down, every one is ready to bite him.
Dutch
Put not your trust in princes.
Dutch
The praise of fools is censure in disguise.
Dutch
Great cry and little wool, quoth the devil, when he sheared his hogs.
Dutch
The worse the wheel, the more it creaks.
Dutch