Is there any New Testament scripture which explicitly says (or even implies) that the faith of believers that led to salvation is in anything other than – or in addition to – the facts that Jesus is Lord (Romans 10:9) and the Christ, the Son of God (John 20:31, 11:27; 1 John 5:1-5) … that He came from God and was going back to God (John 16:27-28); … that God raised Him from the dead (Romans 4:24; 1 Peter 1:21) … and that God will bring, with Jesus, those who have died in Him (1 Thessalonians 4:14)?

Is belief in any of those facts regarded by scripture as optional?

Isn’t a teaching which denies or refutes any of these tenets of belief called heretical?