Faith is the power, obedience the sacrifice, love the means, Christ the reason.
A testimony of the hope of redemption is something which cannot be measured or counted. Jesus Christ is the source of that hope.
Just as chalk can be removed from a chalkboard, with sincere repentance, the effects of our transgression can be erased through the atonement of Jesus Christ.
Christ's mercy is the mighty healer; even to the wounded innocent.