When you forgive, you do not say, “Because I forgive you, I now trust you.” No. You can forgive and still not trust. If the person is showing you that he or she is a danger to you, then mistrust of his or her behavior is warranted. At the same time, and this is stated specifically to those who have experienced trauma, be careful not to confuse a general mistrust and particular mistrust toward a particular person. In other words, many traumatized people have a pervasive mistrust that needs work. Sometimes the traumatized person meets someone who truly is a good person, reliable, and safe to be with, yet the mistrust from past relationships is so great that he or she just cannot give of oneself in the new relationship. Knowing this and working deliberately on the previous issues of mistrust will help. Forgiveness will help. Time will help. Trust is such a delicate thing and needs work if it will improve.
From the book, The Forgiving Life, APA Books, 2012.