The Bible (King James Version) on maturity

In the beginning God created the heaven and the earth.

Be fruitful, and multiply, and replenish the earth, and subdue it

It is not good that the man should be alone; I will make him an help meet for him.

Maturity is a bitter disappointment for which no remedy exists, unless laughter can be said to remedy anything.

Kurt Vonnegut1922–2007Cat’s Cradle (1963), Chapter 88

• Laughter

Immoderate desire is the mark of a child, not a man.

Democritus460–360 BCFreeman (1948), p. 152

I live in that solitude which is painful in youth, but delicious in the years of maturity.

Albert Einstein1879–1955Out of My Later Years (1950), Ch. 2 “Self-Portrait” (1936), p. 5

• Age