For each of us there is a set limit to our intellectual powers which we cannot pass. — René Descartes
By ‘God’, I understand, a substance which is infinite, independent, supremely intelligent, — René Descartes
It is possible that I am dreaming right now and that all of my perceptions are false. — René Descartes
Thus each truth discovered was a rule available in the discovery of subsequent ones. — René Descartes