“One life is all we have, and we live it as we believe in living it, and then it's gone. But to surrender what you are, and live without belief - that's more terrible than dying - more terrible than dying young.”
Quote is often seen as attributed to Joan of Arc. However, the quote is actually a line from a script for the 1946 Broadway play entitled Joan of Lorraine by Maxwell Anderson which later become a movie in 1948 entitled Joan of Arc directed by Victor Fleming and starring Ingrid Bergman. The line is spoken by Joan of Arc to Bishop Pierre Cauchon in Act II, Scene III of the play. ( Script http://books.google.com/books?id=bOe6kHHbSiEC)
Misattributed
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Joan of Arc 15
French folk heroine and Roman Catholic saint 1412–1431Related quotes

Quoted by Diogenes Laërtius; translation from C. D. Yonge (trans.), The Lives and Opinions of Eminent Philosophers (London: H. G. Bohn, 1853), p. 196.
His dying words.

Source: Aphorisms and Reflections (1901), p. 160
“Sometimes the dying live more fiercely and wisely than the rest of us. (146)”
Source: God is No Laughing Matter

The moment of death is the most unimportant moment of life. Nothing can be done then. You cannot even do a favor for a friend, except to remember him in your will.
My Reviewers Reviewed (lecture from June 27, 1877, San Francisco, CA)

“We live a dying dream / If you know what I mean”
Falling Down
Dig Out Your Soul (2008)

“Good, to forgive;
Best, to forget!
Living, we fret;
Dying, we live.”
Dedication to La Saisiaz.
Bartlett's Familiar Quotations, 10th ed. (1919)