Your sins will find you out.
Your own faults look as big to the other fellow as his do to you.
Your ignorance is your worst enemy.
Young courage and old caution are a strong pair.
You'll hear a lot of things before your ears drop off.
You will never find a cat on a cold hearth.
You must pay the fiddler if you want to dance.
You must not enthrone ignorance just because there is much of it.
You must cut your coat according to your cloth.