Augustine on Thinking and Believing

Everything which is believed should be believed after thought has preceded; although even belief itself is nothing else than to think with assent. For it is not every one who thinks that believes, since many think in order that they may not believe; but everybody who believes, thinks — both thinks in believing, and believes in thinking.

Augustine, Predestination of the Saints. Quoted in Bradley G. Green, The Gospel and the Mind (Crossway, 2010), 83.