We have all sinned and only the blood of Christ can cleanse us from our sins. Every one of us needs to come in contact with His blood before we die. The blood of Jesus is truly powerful.
When we give blood it is just a donation but when Jesus gave His blood it was a total sacrifice. When we give blood we may be uncomfortable but when Jesus gave His blood He suffered extreme agony. The blood we give will eventually expire but the blood of Christ will endure forever. The blood we give may be expensive but the blood of Christ is offered freely. And our blood may be rejected because of contamination but the blood of Christ is absolutely perfect.