“Now that was very impressive. But before you try to impress the ladies in the balcony, make sure the horns come in.”

Source: Silas Marner: The Weaver of Raveloe (1861), Chapter 8 (at page 63)

Book II, ch. 18, Reported in Bartlett's Quotations (1919) as "Be not hurried away by excitement, but say, "Semblance, wait for me a little".
Discourses

Source: Shadow Kiss

If You Want Success (Screenland Interview) (1961)

As quoted in "Salma Hayek's Condom Campaign" at femalefirst.co.uk http://www.femalefirst.co.uk/health/3382004.htm
Context: Before you do anything, think. If you do something to try and impress someone, to be loved, accepted or even to get someone's attention, stop and think. So many people are busy trying to create an image, they die in the process. Sleeping with the wrong person is one thing, but not using a condom because you want to please someone, or because you're in a romantic bubble, is another. … I wish we weren't so busy trying to impress people.

The Nature, Importance and Liberties of Belief (1873)
Context: A man who has a mere factual nature; a man who perceives without much power of reflection; a man who sees only facts, cannot come to any such judgment of truths as the man, higher than he, who not only perceives facts, but has also, by his mental constitution, the power to reason upon them, and to deduce the generic from the specific — that is, the principle from the facts. If it be investigation into the nature of truth as it is contained in the Word of God, a man's moral disposition will color his beliefs. If one, for instance, be largely conscientious, and endowed with small benevolence, the nature of his mind will make him sensitive to those representations of Scripture which depict God as standing upon law; as maintaining righteousness; as being good and just, rather than benevolent and sympathetic. If, on the other hand, a man be himself kind and benevolent, and if he have little conscientiousness, then the elements of sympathy will predominate in the God that he depicts, and the elements which tend towards legality will be comparatively wanting in him. Evidence of justice and law will make but a small impression on such a man, while evidence of goodness will make a prodigious impression upon him.

Misattributed