My little children, let us not love in word, neither in tongue; but in deed and in truth. 1 John 3:18 KJV
And, in fine, of false Sciences I thought I knew the worth sufficiently to escape being deceived by the professions of an alchemist, the predictions of an astrologer, the impostures of a magician, or by the artifices and boasting of any of those who profess to know things of which they are ignorant.