The branches of the Acacia tree in Israel look like this. Also, the Ark of the Covenant was built out of Acacia wood that was in the Holy of Holies, and was required to be sprinkled with the blood of the sacrificed lamb.
When I need motivation while running, I often think of Jesus' flogging in the "Passion" movie and taking spikes in His wrists and feet and long 3" thorns slapped on His head ripping up His scalp as His Blood drips and runs down His Face. He slips and falls in His own Blood while trying to carry His cross all the while taking on Himself the sins of the world. These visualizations help my run pace and my spiritual motivation in all things for God.
Divine Mercy Sunday - "The soul that will go to Confession and receive Holy Communion shall obtain complete forgiveness of sins and punishment. On that day all the divine floodgates through which graces flow are opened. Let no soul fear to draw near to Me, even though its sins be as scarlet.... Mankind will not have peace until it turns to the Fount of My Mercy." (699)