Charles H. Spurgeon on Psalms 53:1

It is to be noted that Scripture saith, The fool hath said in his heart, and not "thought in his heart; "that is to say, he doth not so fully think it in judgment, as he hath a good will to be of that belief; for seeing that it makes not for him that there should be a God, he doth seek by all means accordingly to persuade and resolve himself, and studies to affirm, prove, and verify it to himself as some theme or position, all which labour, notwithstanding that sparkle of our creation light, whereby men acknowledge a Deity, burneth still within; and in vain doth he strive utterly to alienate it or put it out, so that it is out of the corruption of his heart and will, and not out of the natural apprehension of his brain and conceit, that he doth set down his opinion, as the comical poet saith, "Then came my mind to be of my opinion, "as if himself and his mind had been two diverse things; therefore, the atheist hath rather said, and held it in his heart, than thought or believed in his heart that there is no God. Francis Bacon (1560-1626), in "Thoughts on Holy Scripture".