I would encourage them never to forget that they were not always vegans. The self-righteousness of the recently converted hurts, it does not help, other animals.
Tom ReganNever give other people another reason to ignore other animals. That's what we do when we come across as being so much better than the next guy or gal.
Tom ReganEven granting that we [humans] face greater harm than laboratory animals presently endure if ... research on these animals is stopped, the animal rights view will not be satisfied with anything less than total abolition.
Tom Regan