I couldn't help but think how many people have purchased a lock, attached it, and then years later broke up, thus rendering a forever promise a temporary act. There is but one forever love and that comes from the One who does not break promises. In fact, he died validating the promise of the Good Shepherd that gives his life for his sheep. Why? So that in him they have eternal life! Christ is the only lock on eternal love. Our padlock is Jesus, who attaches himself to us. That lock can never be broken!
I am the good shepherd. I know my own and my own know me, just as the Father knows me and I know the Father; and I lay down my life for the sheep. I give them eternal life, and they will never perish, and no one will snatch them out of my hand. (John 10:14-15, 28)