28. If Christ has not been able to develop his teachings in a complete manner, it is because men were so ignorant, and they could acquire knowledge only with time. He talked of things which appeared to them visionary and unreal in their undeveloped state. In order to complete his mission, it was only necessary to explain and develop truths already given. It was unnecessary to add new truth; for the germ of all was found in his words; the key was needed which should unlock their meaning.