He who ploughs with young oxen, makes crooked furrows.
More German Proverbs:
He who cannot help, may hinder.German
A bolt does not always fall when it thunders.
German
They are not all cooks who carry long knives.
German
Man proposes, God disposes.
German
He who pitches too high won't get through his song.
German
Lies have short legs.
German