He howls with the wolves, and bleats with the sheep.
More Dutch Proverbs:
Don't cry herrings till they are in the net.Dutch
Great fishes break the net.
Dutch
An hour in the morning is worth two in the evening.
Dutch
Rejoice in little, shun what is extreme; the ship rides safest in a little stream.
Dutch
He who giveth to the poor lendeth to the Lord.
Dutch
Talk of the wolf and his tail appears.
Dutch