Preserve me, O God, for in you I take refuge. (Psalm 16:1 ESV)
God keeps His promises. Unlike the creatures He brought into existence, even those given the image of God, He is not limited in His power or awareness. Existing outside of space-time, God sees all that was, is and will occur. He knows everything, even what might have happened but did not. He alone is able to fulfill His plans and complete His creation. He alone is capable of fulfilling all the promises He makes.
Christian theology and doctrine use the word “assurance” when describing the believer’s confidence and trust in God. Christians have the assurance of salvation. Assurance is unwavering confidence built upon a foundation of faith. One of the elements of faith is the trust. Trust is the firm and extraordinary belief in the strength and veracity of a person to finish that which they have determined to accomplish. However, with those who are God’s, trust is the emotional certainty and conviction that He will uphold His moral laws and all of the consequences of either keeping or breaking those laws. Part of the image of God given to some of His creation is the ability to feel, know and understand when a moral law is being either upheld or violated. The violation of a moral law will generate fear and hatred in the inner being of a person with a right and wholesome relationship with Him. God promises those who are His that He has forgiven sin because of the sacrifice of His Son. Thus, assurance is the emotional trust that God has fulfilled the moral obligation of His law through the person and work of Jesus Christ. Believers trust that their salvation is secured, not through any of their efforts or work, but because of the work of Christ.
David uses the word preserve, which means to keep, to guard, to protect and save. There are two instances in which God may preserve, or guard and protect His saints. First, God manipulates the things of the world to fulfill His purposes, even when that purpose involves the suffering for righteousness’ sake of the citizen of His kingdom. God also preserves for eternity those who are His.
God works through His providence to bring those who are His to the object of His eternal purpose for them. Knowing all that will happen, or might have happened, God works in His knowledge to ensure those who are His will ultimately be with Him in eternity.
When Jesus was born, the Deceiver, using Herod the Great, sought to have Him murdered.
An angel of the Lord appeared to Joseph in a dream and said, “Rise, take the child and his mother, and flee to Egypt, and remain there until I tell you, for Herod is about to search for the child, to destroy him.” (Matthew 2:13 ESV)
Joseph fled with His family to Egypt. After Herod died, Joseph was told to take Jesus home to Israel.
But when Herod died, behold, an angel of the Lord appeared in a dream to Joseph in Egypt, saying, “Rise, take the child and his mother and go to the land of Israel, for those who sought the child’s life are dead.” (Matthew 2:19-20 ESV)
Paul tells believers that God works in every circumstance to achieve His decreed objectives. “And we know that for those who love God all things work together for good, for those who are called according to his purpose” (Romans 8:28 ESV). God’s providence involves more than the immediate circumstance found in space-time.
Accompanying God’s providence is the theological doctrine of preservation. God preserves, which is exactly what David is praying in Psalm 16:1. God not only protects, He preserves. Jesus tells those who follow Him that God is aware of their circumstance and that those circumstance, though filled with suffering for righteousness’ sake, should not cause fear. God will bring those who are His into eternity with Him where they will never again face such suffering.
I tell you, my friends, do not fear those who kill the body, and after that have nothing more that they can do. But I will warn you whom to fear, fear him who, after he has killed, has authority to cast into hell. Yes, I tell you, fear him! Are not five sparrows sold for two pennies? And not one of them is forgotten before God. Why, even the hairs of your head are all numbered. Fear not; you are of more value than many sparrows. (Luke 12:4-7 ESV)
To fear means to put to flight or scare away, to be struck with dread. Jesus says that those who are His should have no terror because of the machinations and threats of the world toward God and toward those who are identified with God. A debate rages in the Christian world. Can a person who belongs to God lose their salvation? Once a person is saved, changed, recreated, filled with the Holy Spirit, can that person sink back into sin, become corrupt again, and drive away the Holy Spirit? Psalm 16 implies that God will not abandon those whom He makes holy. He is their refuge and His promises are absolute. This does not mean that all people are saved but that those who are God’s are His for eternity. God’s providence confirms that what He has started He will accomplish. God’s preservation confirms that He will not lose any that are His. Our assurance is that through Jesus Christ we will enter the presence of God and live.