“The measure of a man's life is the well spending of it, and not the length.”
Consolation to Apollonius
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Plutarch 251
ancient Greek historian and philosopher 46–127Related quotes

“For the greatness of Reason is not measured by length or height, but by the resolves of the mind.”
Golden Sayings of Epictetus
Context: Knowest thou what kind of speck you art in comparison with the Universe?—That is, with respect to the body; since with respect to Reason, thou art not inferior to the Gods, nor less than they. For the greatness of Reason is not measured by length or height, but by the resolves of the mind. Place then thy happiness in that wherein thou art equal to the Gods. (33).

“The success of a relationship should be measured by its depth, not by its length.”
The Truth: An Uncomfortable Book About Relationships (2015)

“For a while" is a phrase whose length can't be measured. At least by the person who's waiting.”
Source: South of the Border, West of the Sun

In an interview (March 1960) with David Sylvester, edited for broadcasting by the BBC first published in 'Location', Spring 1963; as quoted in Interviews with American Artists, by David Sylvester; Chatto & Windus, London 2001, p. 54
1960's

"On Going on a Journey"
Table Talk: Essays On Men And Manners http://www.blupete.com/Literature/Essays/TableHazIV.htm (1821-1822)
Source: Intuitions and Summaries of Thought (1862), Volume II, p. 82.
“A man cannot spend his life worrying about the unexpected.”
Source: Drenai series, Legend, Pt 1: Against the Horde, Ch. 7