James Randi said this quote

“ Yes, I'm a materialist. I'm willing to be shown wrong, but that has not happened — yet. And I admit that the reason I'm unable to accept the claims of psychic, occult, and/or supernatural wonders is because I'm locked into a world-view that demands evidence rather than blind faith, a view that insists upon the replication of all experiments — particularly those that appear to show violations of a rational world — and a view which requires open examination of the methods used to carry out those experiments. ”