'Adheres' in the Bible

Everyone who believes [with a deep, abiding trust in the fact] that Jesus is the Christ (the Messiah, the Anointed) is born of God [that is, reborn from above—spiritually transformed, renewed, and set apart for His purpose], and everyone who loves the Father also loves the child born of Him.

Who is the one who is victorious and overcomes the world? It is the one who believes and recognizes the fact that Jesus is the Son of God.

The one who believes in the Son of God [who adheres to, trusts in, and relies confidently on Him as Savior] has the testimony within himself [because he can speak authoritatively about Christ from his own personal experience]. The one who does not believe God [in this way] has made Him [out to be] a liar, because he has not believed in the evidence that God has given regarding His Son.