Man is the only animal capable of reasoning, though many others possess the faculty of memory and instruction in common with him.
Intelligence is the faculty of making artificial objects, especially tools to make tools.
What the spiritual investigator has to do to acquire the faculty of looking into the spiritual world consists exclusively of processes of spirit and soul; they have nothing to do with changes in the body, nor with visions arising from an abnormal bodily life.
The true and the approximately true are apprehended by the same faculty; it may also be noted that men have a sufficient natural instinct for what is true, and usually do arrive at the truth. Hence the man who makes a good guess at truth is likely to make a good guess at probabilities.
Sincere regret may be a faculty for paying attention to the future, for sensing a new tide where we missed a previous one, for experiencing timelessness with a grandchild where we neglected a boy of our own.