I think I am, therefore, I am... I think.
When people say that animal rescuers are crazy, what they really mean is that animal rescuers share a number of fundamental beliefs that makes them easy to marginalize. Among those is the belief that Rene Descartes was a jackass.
The basis of all reasoning is the mind's awareness of itself. What we think, the external objects we perceive, are all like actors that come on and off stage. But our consciousness, the stage itself, is always present to us.