A safe person is someone who listens without condemnation, keeps your sharing confidential, and supports and guides you toward the Love of Christ. John Maxwell
How to provide a safe environment
Listen intently while others share using good eye contact and focused attention
Share your honest feelings and experiences. Others won't feel safe to share their shameful feelings if you refuse to be real. Authenticity breeds authenticity.
Affirm encourage and give specific validations for other self-disclosure. Share with them how their stories have touched you personally. (that must be hard.)
Balance sharing time within the group by inviting other members to speak. Listen more speak less. Ask questions instead of telling. Don't try to be the Holy Spirit. Invite him to speak to them.