This revealed and delivered faith was accomplished through holy men of God speaking as they were moved by the Holy Spirit (2 Peter 1:21). The Holy Spirit guided Christ’s apostles into all truth (cf. John 16:13; 1 Corinthians 2:10, 13). Therefore, the revealed faith is the body of truth from Christ that ought to be acknowledged, accepted and adhered to. When we read what has been delivered in the divinely inspired Scripture, we can know the truth is to be believed and obeyed that we may be made free.
The faith is complete, needing no revisions. It is for all peoples for all times. The faith that the apostles believed and preached is the same faith that we must believe and practice today. We should not add to it nor subtract from it. Are we standing in the faith? We can be disqualified if we are not truly standing in the one faith. “Examine yourselves as to whether you are in the faith.” (2 Corinthians 12:5)
The call to contend is in view of the fact that all believers do not keep the one faith. The apostle Paul warned Timothy about departure from the faith. “Now the Spirit expressly says that in latter times some will depart from the faith” (1 Timothy 4:1). “For the time will come when they will not endure sound doctrine, but according to their own desires, because they have itching ears, they will heap up for themselves teachers; and they will turn their ears away from the truth” (2 Timothy 4:3-4). To depart from the faith is to depart from the truth, and be cut from God and Christ.