Jesus healed many sick people and even raised the dead in the time He was on earth, He taught people how to live as well as the principles of the kingdom of heaven. He forgave sins and was the perfect example for us to follow.
Jesus took all of our sins on the cross and was crucified for them. God allowed this to happen so that there would be no separation from Him and that we would not have to pay the penalty of sin of going to hell. God saw Jesus’ death as the only effective ransom and as He had no personal sin He was resurrected after three days. This proves that He is the Son of God and that everything He did throughout His Ministry and crucifixion was legitimate.
Finally He promised He would return again, bringing to conclusion our current way of life, and for all who call upon Him in faith, they will be saved and be with Him in Heaven at an appointed time.