This maxim attributed to Francis Bacon is very often quoted as Scientia est potentia. Perhaps a little too inspired by this motto, I decided to gain knowledge about the original quote, and, to my surprise, found none. There is this phrase, however, used very much passingly and literally parenthetically in De Haeresibus: (nam & ipsa scientia potestas est). But, I suppose, this phrase expresses the gist of Bacon's philosophy better than any other. Still, it should be probably quoted a little closer to the source: Scientia potestas est. Also, potestas sounds a bit more classical, at least to my ear.
See also Bible verses in Latin