IMO Christians accept Christ Jesus as Lord (as in Acts 16:31, 2Cor. 4:5 & Col. 2:6) or Love Jesus as Messiah and Lord (John 8:42). The main points of Christian orthodoxy implicit in these statements can be explained or elaborated as follows:
1. There is a/one all-loving and just Lord or God (Deut. 6:4, John 3:16, 2Thes. 1:6), who is both able (2Tim. 1:12) and willing (1Tim. 2:3-4, Ezek. 33:11) to provide all morally accountable human beings salvation or heaven—a wonderful life full of love, joy and peace forever.
2. Human beings are selfish or sinful (Rom. 3:23, 2Tim. 3:2-4, Col. 3:5), miserable (Gal. 5:19-21), and hopeless (Eph. 2:12) or hell-bound at the judgment (Matt. 23:33 & 25:46) when they reject God’s salvation (John 3:18, Rom. 2:5-11).
3. Jesus is God’s Messiah/Christ and incarnate Son, the way that God has chosen (John 3:16, Acts 16:30-31, Phil. 2:9-11) of providing salvation by means of his atoning death on the cross for the payment of the penalty for the sins of humanity (Rom. 3:22-25 & 5:9-11), followed by his resurrection to reign in heaven (1Cor. 15:14-28).
4. Thus, every person who hears the NT Gospel needs to repent and accept God’s justification in Jesus as Christ/Messiah the Lord or Supreme Commander (Luke 2:11, John 14:6, Acts 16:31), which means trying to obey His commandment to love one another (Matt. 22:37-40, John 13:35, Rom. 13:9)—forever (Matt. 10:22, Psa. 113:2).
5. Then God’s Holy Spirit will establish a saving relationship with those who freely accept Him (Rev. 3:20) that will eventually achieve heaven when by means of persevering in learning Truth/God’s Word/sanctification everyone cooperates fully with His will (John 14:6, 17&26, Rom. 8:6-17, Gal. 6:7-9, Eph. 1:13-14, Heb. 10:36, 12:1, Jam. 1:2-4).