“Watch the students at a vivisection. It is the blood and suffering, not the science, that rivet their breathless attention. If hospital service makes young students less tender of suffering, vivisection deadens their humanity, and begets indifference to it.”
Source: Surgical Anaesthesia (1894), p. 310
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Henry Jacob Bigelow 7
American surgeon 1818–1890Related quotes
“Vivisection in America”, in Animals' Rights: Considered in Relation to Social Progress, New York and London: Macmillan, 1894, p. 145 https://archive.org/stream/03021000R.nlm.nih.gov/03021000R#page/n158/mode/2up.

Cardinal calls on faithful to have tender hearts during Lent https://www.catholicnewsagency.com/news/29155/cardinal-calls-on-faithful-to-have-tender-hearts-during-lent (5 March 2014)

Source: Zen Is Right Here: Teaching Stories and Anecdotes of Shunryu Suzuki, Author of "ZEN Mind, Beginner's Mind"

The Philippine review (Revista filipina) [1921]

“Young people suffer less from their faults than from the prudence of the old.”
Source: Reflections and Maxims (1746), p. 174.
People's Education interview (2007)
Context: Pay attention to your students. Hear what they say, try to find out what their capacities are, what make sense to them. Adapt what you are doing and saying to those capacities, but make your students stretch upward. I think the trick is to adapt to the level of a student, but never rest on that level — always make them reach out. … If a student does not quite get it the first time, he or she will come back and get it later. If you don’t set your writing — and teaching — at a level that makes them stretch, they are never going to develop their intellectual muscle.