“Never do a thing concerning the rectitude of which you are in doubt.”
Letter 18, 5.
Letters, Book I
Original
Quod dubites, ne feceris.
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Pliny the Younger 50
Roman writer 61–113Related quotes

“Living is
a thing you do
now or never —
which do you?”
Living Is —
Grooks

Source: Thomas Paine From 'The Gods and Other Lectures'

The Gospel in a Pluralist Society. Eerdmans, 1989 (reprinted 2002),19.

“From the Divine, Eternal Spirit springs
Order and Rule and Rectitude of Things”
The True Grounds Of Eternal And Immutable Rectitude" St. 6
Miscellaneous Poems (1773)
Context: From the Divine, Eternal Spirit springs
Order and Rule and Rectitude of Things,
Thro' outward Nature, His Apparent Throne,
Visibly seen, intelligibly known, —
Proofs of a Boundless Pow'r, a Wisdom's Aid,
By Goodness us'd, Eternal and Unmade.

Lillian Moller Gilbreth (1962) Conference and Convention Proceedings American Institute of Industrial Engineers. p. 21.

“Do you know, a horrible thing has happened to me. I have begun to doubt Tennyson.”
Letter to A.W.M. Baillie (10 September 1864)
Letters, etc