Veganism isn't about maintaining a state of absolute purity

[V]eganism isn’t about maintaining a state of absolute purity. It’s about making informed choices to refrain from using animal products so that you remove yourself as much as it is possible from the cycle that perpetuates a demand for the continued exploitation of non-human animals—and by “possible” I really, really don’t mean “convenient”.
~ Mylène Ouellet (October 27, 2010)