“Easy, Mr. Pendleton. Easy. Good to have your dander up, but it’s discipline that wins the day.”
These were lines in the film Gods And Generals (2003); they are not actual quotations of Jackson.
Misattributed
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Thomas Jackson 58
Confederate general 1824–1863Related quotes

“[E]conomics is a narrative discipline, and explanations are easy to fit retrospectively.”
page 257
Fooled by Randomness (2001)

“Better, the perfect, easy discipline of the swallows dip and swoop, without east or west.”
On open form poetry in "Some Yips & Barks in the Dark" in Naked Poetry : Recent American Poetry in Open Forms (1976) edited by Stephen Berg

Changes, reported in Bartlett's Familiar Quotations, 10th ed. (1919).

“It’s not easy remembering the good times.”
Source: How to Fall in Love