“Man errs as long as he strives.”
The quote "Man errs as long as he strives." is famous quote by Johann Wolfgang von Goethe (1749–1832), German writer, artist, and politician.
Es irrt der Mensch, so lang er strebt.
Variant translation: Man will err while yet he strives.
Prologue in Heaven
Faust, Part 1 (1808)
Original
Es irrt der Mensch, solang er strebt.
Faust I, Vers 317 / Der Herr → Zitat im Textumfeld
Dramen, Faust. Eine Tragödie (1808)
Variant: Es irrt der Mensch, so lang er strebt.
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Johann Wolfgang von Goethe 185
German writer, artist, and politician 1749–1832Related quotes

τοῖς πᾶσι κοινόν ἐστι τοὐξαμαρτάνειν:
ἐπεὶ δ᾽ ἁμάρτῃ, κεῖνος οὐκέτ᾽ ἔστ᾽ ἀνὴρ
ἄβουλος οὐδ᾽ ἄνολβος, ὅστις ἐς κακὸν
πεσὼν ἀκῆται μηδ᾽ ἀκίνητος πέλῃ.
Source: Antigone, Lines 1024-1027; cf. Book of Proverbs 28:13

Attributed to Aristotle in Bernhoff A. Dahl, Optimize Your Life! http://books.google.gr/books?id=B1Z2XP_DamQC&dq=, Trionics International Inc., 2005, p. 111.
Disputed

“The wise man will live as long as he ought, not as long as he can.”
Sapiens vivit quantum debet, non quantum potest.
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter LXX: On the proper time to slip the cable, Line 4.

“In a place where there are no men, strive to be a man.”
<span lang="he" dir="rtl">במקום שאין אנשים, השתדל להיות איש.</span>
Bemakom she'ein anashim, hishtadel lihyot ish.
2:6
Pirkei Avot

“But strive still to be a man before your mother.”
Connoisseur. Motto of No. iii.
Bartlett's Familiar Quotations, 10th ed. (1919)

“Man does not strive for happiness; only the Englishman does that”
Der Mensch strebt nicht nach Glück; nur der Engländer thut das
Maxims and Arrows, 12
Twilight of the Idols (1888)