He lived a perfectly sinless life, healed many, did many miracles, and forgave people of their sins - something that only God has authority to do.
And then, when the time was right, God was crucified. He willingly laid down His precious life in our place, on that cross. God's own blood was shed for the forgiveness of our sins, because He took our place on that cross. He took the wrath that we deserve on that cross. He died, and He was buried in a tomb. But three days later, He was risen from the dead in His resurrected body! Many people saw Him, and the Gospels are historical evidence of this.
Jesus Christ is God in the flesh. If you put your trust, your faith, in the finished work of Christ on that cross, in what He did FOR YOU on that cross, in His shed blood for the forgiveness of your sins, then you will go to heaven. You will get to spend eternity with the Lord God! If you put your trust in what Jesus did - and ONLY that, NOT in your own works, then you will get to spend eternity with God.
'that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved;' - Romans 10:9
But if you choose to reject Him, then you are choosing that you want to go to hell. You are choosing eternal torture and fire, eternal separation from the Lord God forever. There will be no second chances. If you choose to reject Jesus while you are still alive on this earth, then you will spend eternity in torture in hell and in the lake of fire.
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