I told the Red Cross staff and volunteers helping that was there for the juice and cookies. The truth is that my gratefulness for someone of the same type of blood as me, gave and I got.It was given as a gift. I could not buy it or repay the person who gave.
God sent His Son, who gave the only type of blood that could clean me and all humanity from sin. It is a gift to be received. Turning down that gift is terminal for our spiritual lives. Accepting His gift results in forgiveness that removed my guilt and continues to forgive each time admit I mess up, admit it, and ask to be forgiven again.