Step 4 in underhill's stages of mystical experiences involves a fuller turn inward, back toward separateness called

dark night of the soul

Explanation:

The "dark night of the soul" is a metaphor for a mystical experience that involves paradox because this experience is illuminating and yet obscures consciousness and causes suffering. To make sense of this contradiction, it is necessary to examine the rich symbolism of the night in the minds of the peoples.

In short, step 4 in underhill's stages of mystical experiences involves a fuller turn inward, back toward separateness called the dark night of the soul.

answer; /// the above statement is ( true);