As a theologian, Melanchthon did not show so much creative ability, but rather a genius for collecting and systematizing the ideas of others, especially of Luther, for the purpose of instruction. He kept to the practical, and cared little for connection of the parts, so his "Loci" were in the form of isolated paragraphs. The fundamental difference between Luther and Melanchthon lies not so much in the latter's ethical conception, as in his humanistic mode of thought which formed the basis of his theology and made him ready not only to acknowledge moral and religious truths outside of Christianity, but also to bring Christian truth into closer contact with them, and thus to mediate between Christian revelation and ancient philosophy.