Intelligence, which is often confused with intellect, is something which is to be found even in the lower creation. It can be traced in plant life, and sensed even in the heart of the rock. People often think that the intellect is a development which manifests as mind in the life of man, and that the lower animals have no mind, that mind is a development of matter depending upon the brain. But the mystics of all times, the prophets and all meditative souls, say that what was, is and will be, and as it is all the same substance, life is not subject to change, nor does it develop. It is a different grade of evolution which makes us capable of understanding, and which gives us the feeling that mind is a development proceeding from matter. The great ones, the meditative souls who dwelt in the wilderness and the forests and communicated with the life around them, realized this truth; and very often they experienced a greater harmony and peace and upliftment where there was no visible life.