From The Autobiography of John G. Fee:
"We begin with and build upon a person - the Lord Jesus Christ, the Son of God, the Saviour from sin; and 'other foundations can no man lay.'
That Jesus Christ, the Son of the living God, came into the world to save sinners, is the creed of the gospel.
Manifested faith in Him, as the Saviour from sin, is the reason for fellowship and cooperation.
This faith in a person, the Lord Jesus Christ, induced as it is by the truth and Spirit of God, carries with it a radical change in the believer; and entire conformity of will, of affection, of life to the Lord Jesus.
This is seen from the very import of the original word (pisteuo), translated 'believe.' This word implies not mere intellectual assent to a fact, even the fact that Jesus is the Son of God, but the word, when used to designate faith in, or belief on a person, implies more; it implies committal.
The soul that thus believes on, commits itself to the Lord Jesus, opens the door of the heart to Christ, and in so doing becomes 'a new creature.' Pertinent are the words of the apostle, 'He that believeth that Jesus is the Christ (commits himself to Christ) is born of God.'