“Until you value yourself, you won't value your time. Until you value your time, you will not do anything with it.”
Source: The Road Less Traveled: A New Psychology of Love, Traditional Values, and Spiritual Growth
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M. Scott Peck 26
American psychiatrist 1936–2005Related quotes

“Never dismiss anyone’s value until you know him.”
Source: The Dark Is Rising (1965-1977), Greenwitch (1974), Chapter 2 (p. 18)

“Sometimes you will never know the value of a moment until it becomes a memory.”
Georges Duhamel in THE HEART'S DOMAIN (1919). As it was composed in French, the wording in English may vary in translation. Theodore Geisel / Dr. Seuss was born in 1904, and would have been about 15 years old at the time that it was published. The full text can be found at the link below: We do not know the true value of our moments until they have undergone the test of memory. Like the images the photographer plunges into a golden bath, our sentiments take on color; and only then, after that recoil and that trans-figuration, do we understand their real meaning and enjoy them in all their tranquil splendor.
Misattributed

“Always take a stand for yourself, your values. You're defined by what you stand for”
“You won't know until it's over. You won't find me in time.”
Source: By the Time You Read This, I'll Be Dead

Time Magazine (27 March 1964).

Nicholas Sparks, Chapter 11, p. 187
2000s, Three Weeks with My Brother (2004)
Source: Three Weeks With My Brother