I'll Forgive You of Your Past if You Forgive Me of Mine

This is a digital art piece entirely created on my PC with my XP-Pen Monitor. The drawing was adapted from a free reference photo, and the background was created with Adobe Photoshop brushes. This concept was inspired from a quote, from a dark comedy film I really enjoy titled “Dan in Real Life”. The quote “I’ll forgive you of your past if you forgive me mine” inspired this because I felt the quote is an important aspect to successful relationships/friendships. How do we practice unconditional love without practicing forgiveness?