To love is to act.

[Aimer, c’est agir.]

Victor Hugo (1802–1885) French writer, journalist, human rights activist, politician

Journal (1885-05-19)
    (Source)

Last words of his diary, written days before his death on May 22. (I have seen it identified as two days, three days, and two weeks).

While identified with his diary, the "manuscript" is a single page of watermarked paper.