Sell also: essential, necessity, requirement, requisite
• Noun: anything indispensable; examples: "food and shelter are necessities of life", "the essentials of the good life", "allow farmers to buy their requirements under favorable conditions", "a place where the requisites of water fuel and fodder can be obtained"
• Adj: absolutely essential
• Adj: unavoidably determined by prior circumstances; example: "the necessary consequences of one's actions"
A man who suffers before it is necessary, suffers more than is necessary.
True eloquence consists in saying all that is necessary, and nothing but what is necessary.
It isn't necessary to be rich and famous to be happy. It's only necessary to be rich.