A bad workman never finds a good tool.
More French Proverbs:
All is well that ends well.French
A saint that cannot cure anyone has few disciples.
French
By dint of going wrong all will come right.
French
There are good dogs of all sizes.
French
To rise at five, dine at nine, sup at five, go to bed at nine, makes a man live to ninety-nine.
French
Who looks not before finds himself behind.
French