The Bible’s answer
Jesus saved faithful humans when he gave his life as a ransom sacrifice. (Matthew 20:28) Thus, the Bible calls Jesus the “Savior of the world.” (1 John 4:14) It also states: “There is no salvation in anyone else, for there is no other name under heaven that has been given among men by which we must get saved.”—Acts 4:12.
Jesus ‘tasted death for everyone’ who exercises faith in him. (Hebrews 2:9; John 3:16) Thereafter, “God raised him up from the dead,” and Jesus returned to heaven as a spirit creature. (Acts 3:15) There, Jesus is able “to save completely those who are approaching God through him, because he is always alive to plead for them.”—Hebrews 7:25.
Why do we need Jesus to plead for us?
We are all sinners. (Romans 3:23) Sin puts a barrier between us and God, and it leads to death. (Romans 6:23) But Jesus serves as “an advocate” for those who exercise faith in his ransom sacrifice. (1 John 2:1, footnote) He pleads in their behalf, asking God to hear their prayers and grant forgiveness of their sins on the basis of Jesus’ sacrificial death. (Matthew 1:21; Romans 8:34) God acts on such pleas made by Jesus because they are in harmony with His will. God sent Jesus to the earth “for the world to be saved through him.”—John 3:17.
Is belief in Jesus all that we need to be saved?
No. Although we must believe in Jesus to gain salvation, more is required. (Acts 16:30, 31) The Bible says: “Just as the body without spirit is dead, so also faith without works is dead.” (James 2:26) To be saved, we must:
Learn about Jesus and his Father, Jehovah.—John 17:3.
Demonstrate our faith by obeying their commands. (Luke 6:46; 1 John 2:17) Jesus taught that not everyone who called him “Lord” would be saved but only those “doing the will of [his] Father who is in the heavens.”—Matthew 7:21.
Continue to demonstrate our faith despite hardships. Jesus made that clear when he said: “The one who has endured to the end will be saved.”—Matthew 24:13.