Tell not all you know; believe not all you hear; do not all you are able.
More German Proverbs:
Truth creeps not into corners.German
Not too little, not too much.
German
The dog does not get bread every time he wags his tail.
German
In bad fortune hold out, in good hold in.
German
Small profits and often, are better than large profits and seldom.
German
Hobby horses are dearer than Arabians.
German