The Varieties of Religious Experience (1902)
by William James

 . . . First of all, then, I ask, What does the expression 'mystical states of consciousness' mean? How do we part off mystical states from other states?

The words 'mysticism' and 'mystical' are often used as terms of mere reproach, to throw at any opinion which we regard as vague and vast and sentimental, and without a base in either facts or logic. For some writers a 'mystic' is any person who believes in thought-transference, or spirit-return. Employed in this way the word has little value: there are too many less ambiguous synonyms. So, to keep it useful by restricting it, I will do what I did in the case of the word 'religion,' and simply propose to you four marks which, when an experience has them, may justify us in calling it mystical for the purpose of the present lectures. In this way we shall save verbal disputation, and the recriminations that generally go therewith.

1. 1. Ineffability.- The handiest of the marks by which I classify a state of mind as mystical is negative. The subject of it immediately says that it defies expression, that no adequate report of its contents can be given in words. It follows from this that its quality must be directly experienced; it cannot be imparted or transferred to others. In this peculiarity mystical states are more like states of feeling than like states of intellect. No one can make clear to another who has never had a certain feeling, in what the quality or worth of it consists. One must have musical ears to know the value of a symphony; one must have been in love one's self to understand a lover's state of mind. Lacking the heart or ear, we cannot interpret the musician or the lover justly, and are even likely to consider him weak-minded or absurd. The mystic finds that most of us accord to his experiences an equally incompetent treatment.

2. Noetic quality.- Although so similar to states of feeling, mystical states seem to those who experience them to be also states of knowledge. They are states of insight into depths of truth unplumbed by the discursive intellect. They are illuminations, revelations, full of significance and importance, all inarticulate though they remain; and as a rule they carry with them a curious sense of authority for after-time.
   
   These two characters will entitle any state to be called mystical, in the sense in which I use the word. Two other qualities are less sharply marked, but are usually found. These are:
3. Transiency.- Mystical states cannot be sustained for long. Except in rare instances, half an hour, or at most an hour or two, seems to be the limit beyond which they fade into the light of common day. Often, when faded, their quality can but imperfectly be reproduced in memory; but when they recur it is recognized; and from one recurrence to another it is susceptible of continuous development in what is felt as inner richness and importance.
4. Passivity.- Although the oncoming of mystical states may be facilitated by preliminary voluntary operations, as by fixing the attention, or going through certain bodily performances, or in other ways which manuals of mysticism prescribe; yet when the characteristic sort of consciousness once has set in, the mystic feels as if his own will were in abeyance, and indeed sometimes as if he were grasped and held by a superior power. This latter peculiarity connects mystical states with certain definite phenomena of secondary or alternative personality, such as prophetic speech, automatic writing, or the mediumistic trance. When these latter conditions are well pronounced, however, there may be no recollection whatever of the phenomenon and it may have no significance for the subject's usual inner life, to which, as it were, it makes a mere interruption. Mystical states, strictly so called, are never merely interruptive. Some memory of their content always remains, and a profound sense of their importance. They modify the inner life of the subject between the times of their recurrence. Sharp divisions in this region are, however, difficult to make, and we find all sorts of gradations and mixtures.

The well-known passage from Walt Whitman is a classical expression of this sporadic type of mystical experience.

"I believe in you, my Soul...
Loaf with me on the grass, loose the stop from your throat;...
Only the lull I like, the hum of your valved voice.
I mind how once we lay, such a transparent summer morning.
Swiftly arose and spread around me the peace and knowledge that pass all the argument of the earth,
And I know that the hand of God is the promise of my own,
And I know that the spirit of God is the brother of my own,
And that all the men ever born are also my brothers and the women my sisters and lovers,
And that a kelson of the creation is love."