"He that believeth on the Son of God hath the witness in himself: he that believeth not God hath made him a liar; because he believeth not the record that God gave of his Son. And this is the record, that God hath given to us eternal life, and this life is in his Son. He that hath the Son hath life; and he that hath not the Son of God hath not life. These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God."
In George Orwell's brilliant satire of the Communist revolution in Russia, Animal Farm, the animals join together to overthrow the farmer and take over the farm. The plan is that they will jointly share in the rewards of their efforts. But the pigs take over the system and began exploiting the other animals, just as the farmer had done. They justified their actions by changing the rules they had laid out to govern the farm. The first rule that once had been “All animals are equal” was changed to “All animals are equal, but some animals are more equal than others.” The animals could not depend on the pigs, because their promises for the future were false.
When we come to God for salvation, we do so because we can trust Him. He never changes His mind or goes back on His word. He has guaranteed our salvation by His very nature and character, and He has placed His name on us as His guarantee. “For when God made promise to Abraham, because he could swear by no greater, he sware by himself” (Hebrews 6:13). We do not have to doubt the certainty of our salvation because it is based on what God has already done.
God has given us an unchanging and unshakable promise of salvation, and we can fully trust Him.