Not much in our lives is certain. We could lose our job and have to move in a month. We could get into a car accident that makes the rest of our life quite difficult. Or we could face a diagnosis that immediately brings tears to our eyes and ache to our heart. Much of our life is filled with uncertainty.
However, the promises of God are certain. We as Christians know that the promises of God are sure, solid, and steadfast. They will not change and he will keep them perfectly. This is a major source of comfort in the Christian life. He loves me and will continue to love me (Rom 8:39). The Lord will never leave me or forsake me (Heb. 13:5). In his sovereign providence, nothing will happen to me apart from his will and everything that does happen to me is ultimately for my Christian good (Rom. 8:28). These are unshakable promises that will come to pass.
There are many promises in Scripture that are of great comfort to the Christian. One that we might not think of too often is the fact that when a person comes to saving faith in Christ, it is another promise kept: Everyone that the Father gives me will come to me (John 6:37 CSB). Jesus says: I promise that those whom the Father has given me will come to me. John Bunyan explained this truth in a way that magnified the sovereign grace of God:
…Coming to Jesus Christ aright is an effect of their being, by God, given to Christ before. Mark, ‘They’ shall come. Who? ‘Those’ that are given. They ‘come,’ then, because they were ‘given,’ “thine they were, and thou gavest them me.”
Now, this is indeed a singular comfort to them that are coming in truth to Christ, to think that the reason why they come is, because they were given of the Father before to him. Thus, then, may the coming soul reason with himself as he comes: ‘Am I coming, indeed, to Jesus Christ? This coming of mine is not to be attributed to me or my goodness, but to the grace and gift of God to Christ. God gave first my person to him, and, therefore, hath now given me a heart to come.’
…These words, shall come, make thy coming to be also the effect of an absolute promise; coming sinner, thou art concluded in a promise; thy coming is the fruit of the faithfulness of an absolute promise. It was this promise, by the virtue of which thou at first receivedst strength to come; and this is the promise, by the virtue of which thou shalt be effectually brought to him.
Covenant Presbyterian Church (OPC)