Sir Francis Bacon was the first person attributed to the phrase "Knowledge is Power'. It dates back to 1597 when he published the maxim in his book, "Meditationes Sacrae and Human Philosophy'.
Alan Kay (1971) attributed to this pharase at a 1971 meeting of PARC, a research and development company in Palo Alto, California, with a distinguished reputation for its contributions to information technology and hardware systems.
The equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa. The mass and energy were in fact equivalent. Albert Einstein in Atomic Physics (1948).
The power of communication of thoughts and opinions is the gift of God, and the freedom of it is the source of all science, the first fruits and the ultimate happiness of society; and therefore it seems to follow, that human laws ought not to interpose, nay, cannot interpose, to prevent the communication of sentiments and opinions in voluntary assemblies of men. Eyre, L.C.J., Hardy's Case (1794), 24 How. St. Tr. 206; reported in James William Norton-Kyshe, The Dictionary of Legal Quotations (1904), p. 99.
Soekarno, speech at Independence Day August 17, 1961 his last quotes before his downfall.