He who blackens others does not whiten himself.
More German Proverbs:
He who always thinks it is too soon, is sure to come too late.German
Eat your fish while it is still fresh and marry the girl while she is still young.
German
Two hard flints never grind well.
German
Who heeds not little things, will be troubled about lesser ones.
German
Love talks, even with closed lips.
German
His hens lay eggs with two yolks.
German