A Voice Crying in the Wilderness (Vox Clamantis in Deserto) (1990)
“It's not wise to violate the rules until you know how to observe them.”
Help us to complete the source, original and additional information
T.S. Eliot 270
20th century English author 1888–1965Related quotes

“You are wise, and know how to apply it.”
Precious Remedies Against Satan's Devices, 1652

“Women are like tea bags. You never know how strong they are until you put them in hot water.”
Another quote often attributed to her without an original source in her writings, as in The Wit and Wisdom of Eleanor Roosevelt (1996), p. 199. But once again archivists have not been able to find the quote in any of her writings, see the comment from Ralph Keyes in The Quote Verifier above.
A very similar remark was attributed to Nancy Reagan, in The Observer (29 March 1981): "A woman is like a teabag — only in hot water do you realize how strong she is."
Variants:
A woman is like a teabag. You never know how strong she is until she gets into hot water.
A woman is like a tea bag, you can not tell how strong she is until you put her in hot water.
A woman is like a tea bag; you can't tell how strong she is and how much to trust her until you put her in hot water.
Disputed

As quoted in "Annals of Science II-DNA" by Horace Freeland Judson in The New Yorker (4 December 1978), p. 132

“People don't care how much you know until they know how much you care”
Variant: No one cares how much you know, until they know how much you care
“A wise man rules his passions, a fool obeys them.”
Maxim 49
Sentences, The Moral Sayings of Publius Syrus, a Roman Slave

“If you would know a man, observe how he treats a cat.”
Source: The Door Into Summer (1957), Chapter 1

New Pathways in Science: Messenger Lectures 1934 (1947), p. 211.