“2308. He that spares the Bad, injures the Good.”
Introductio ad prudentiam: Part II (1727), Gnomologia (1732)
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Thomas Fuller (writer) 420
British physician, preacher, and intellectual 1654–1734Related quotes

Source Book in Ancient Philosophy (1907), The Golden Sayings of Democritus

““He is a good person. He did a bad thing,” Leiderman told the judge.”
As stated in, A Simple Phrase From a Sentencing Hearing in a Difficult High-Profile Case. http://jayleiderman.com/blog/jay-leiderman-quoted-part-9-a-simple-phrase-from-a-difficult-high-profile-case/
Variant: He is a good person. He did a bad thing.

“He who cannot endure the bad will not live to see the good.”
Source: The Winter Rose

Naught venture naught have. spare to speak spare to speed.
Unknown unkissed. it is lost that is unsought.
As good seek nought, said I, as seek and find naught.
Part I, chapter 11.
Proverbs (1546)

Quoted in "Tony Abbott under fire" http://www.abc.net.au/am/stories/s596135.htm on abc.net.au, July 22, 2002.
2002