Necessity is the mother of taking chances.
Necessity knows no law.
The superfluous is the most necessary.
Necessity. The one being to whom even the gods must bow.
That for which there is no occasion, had always better be dispensed with.
The minute you get the idea you’re indispensable, you aren’t.
Necessity makes the best soldiers.
Necessity changes many a course but never a goal.
Necessity may render a doubtful act innocent, but it cannot make it praiseworthy.
Necessity makes laws, but does not obey them.