bare one's soul
Reveal one's most private thoughts and feelings. For example, Teenagers rarely bare their souls to their parents; they prefer their peers. This figurative use of the verb bare, which literally means “make bare” or “uncover,” dates from a.d. 1000.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.