No man understands knavery better than the abbot who has been a monk.
More French Proverbs:
The gown does not make the monk.French
Nothing is done while something remains undone.
French
A foolish woman is known by her finery.
French
The best-laid schemes of mice and men gang aft agley.
French
God save you from a man who has but one business.
French
A party of one alone is not a party.
French