“A dog barks when his master is attacked. I would be a coward if I saw that God's truth is attacked and yet would remain silent, without giving any sound.”
John Calvin, quoted in The Westminster Collection of Christian Quotations (2001) by Martin H. Manser, p. 56
Misattributed
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Pearl S. Buck 95
American writer 1892–1973Related quotes

Letter 130 (to the Queen of Navarre), 28 April, 1545.

Washington Post, 1983 November 13.
On animal research and activism against it

Source: The moon and the bonfire (1950), Chapter XVIII, p. 107

Jerzy Robert Nowak, Na przekór skorpionom. Wyznania upartego Polaka, Warszawa 2005, p. 52.
Attributed

“The old dog barks backward without getting up;
I can remember when he was a pup.”
" The Span of Life http://members.tripod.com/~AMDB7/poems/thespanoflife.html" (1936)
1930s

The Responsibility of Intellectuals: Arthur Dorfman, reply by Noam Chomsky http://www.nybooks.com/articles/12104, New York Review of Books, April 20, 1967.
Quotes 1960s-1980s, 1960s