The only way for a human being to be made right with God & escape the torments of a literal & eternal hell is to accept the offering Jesus gave, to repent (turn from) their sins & be saved. I will try to put it in simpler language: salvation means that all our sins are put on Jesus’ account, which is paid in full already by His death, so they are “erased.” Then all the righteousness that He has & all the favor He has in the eyes of God the Father, & His sinless perfection are put on our account. We are no longer guilty & condemned in God’s eyes, but are covered in the beautiful goodness of His beloved Son. If we are saved, we will not have to pay the penalty for our sins (death) because Jesus already did. His sacrifice was sufficient for all who will come to Him. The Bible makes it clear that salvation is not a license to sin just because we won’t be accountable for its ultimate price, although saved people do sin, it isn’t willingly & ought to be despised if one is right with God. A person cannot be saved without the work of God’s Holy Spirit in their heart.