As a believer in Yeshua since 1976, I have heard messages about forgiveness and reconciliation many times. In 2010 I contacted a few folks in Los Angeles to ask if someone could provide temporary housing for my sister while she looked for an apartment there. One of those contacts was a young Messianic Rabbi, who promptly offered to share the need with his congregation. I never heard from him again.
I never knew I was holding onto unforgiveness. Then I saw him at the Messiah Conference two years later. I knew I had to forgive him. Something unexpected and totally wonderful happened when I went forward to talk to him.