Having done away with innate ideas, having altogether renounced the vanity of believing that we are always thinking, Locke proves that all our ideas come to us through the senses, examines our ideas both simple and complex, follows the human mind in all its operations, and shows the imperfections of all the languages spoken by man, and our constant abuse of terms. He comes at last to consider the extent, or rather the nothingness, of human knowledge.

—Voltaire, Philosophical Letters