Each person is the chief cause of their success or failure in life.

One can never be sure of one's paternity.

Cooking food for a man is a good way to win his affections.

It is not the tools we use that make us good, but rather how we employ them. / Upon failure, it is easier to blame the tools used rather than how they were employed.

People are primarily concerned with their own interests.

Alternative form of few sandwiches short of a picnic

Synonym of familiarity breeds contempt

A surname from German