One swallow does not make a spring.
More French Proverbs:
The poor man commands respect; the beggar must always excite anger.French
In love, there is always one who kisses and one who offers the cheek.
French
Nothing ages more than a good deed.
French
He who marries a widow also marries her debts.
French
Courting and wooing brings dallying and doing.
French
Better to be envied than pitied.
French