The Church Turing Thesis

Turing principle is one of the single most important things that there is to know in science that many scientists don't know. All computational machines are functionally equivalent so if you know how many computations or comparisons that it will take for a Turing machine to do a computation that is how money it's going to require on any machine you can build. There are no more powerful ones out there that we don't know about yet this is the church Turing thesis and I'm not going to read everything all the quotes word for word but just to kind of remind me where I got these quotes and what the references are.