2 Corinthians 5:19
19It was God [personally present] in Christ, reconciling and restoring the world to favor with Himself, not counting up and holding against [men] their trespasses [but cancelling them], and committing to us the message of reconciliation (of the restoration to favor).
Christ has committed to us the word of reconciliation, he has given us the mandate to go into the world and reconcile souls back to Him. He has given us a mandate to spread the good news, He wants everyone of us to be soul winners, He has given us this great commission to go and preach good tiding to the poor, the meek and the broken hearted.
Christ came to die not for the believers only but for unbelievers, when we preach His word the power is not in the preacher, but in his word in which we speak. We shouldn't be afraid to preach God's word because that is where His power is, so every time we preach the Word this preaching/teaching is backed up by His power.
Romans 5:8-9
8But God shows and clearly proves His [own] love for us by the fact that while we were still sinners, Christ (the Messiah, the Anointed One) died for us.
9Therefore, since we are now justified ([f]acquitted, made righteous, and brought into right relationship with God) by Christ's blood, how much more [certain is it that] we shall be saved by Him from the indignation and wrath of God.
God understood why they were in rottenness. He realized man cannot help himself. He said, let us not kill them, and let us help them. So he died for them. We are saved from the wrath of God through Jesus. Once you enter Jesus, the last day is secured. No judgement is waiting for a child of God who received Jesus. Why? The anger of God which would have been poured on me has been poured on Lord Jesus our saviour.
He came to save and give life.
No believer's individual sin can take him to hell because they have all been forgiven. Our sins have been taken away, it is just that we do not know it. God wants all men saved, nobody is too bad for Him to save. His grace is equal towards all men whether a believer or not, you have God's grace, it is now your relationship with Him that gives you ultimate access into this abundant grace.
For this reason it is compulsory to engage in personal Christianity, one of the greatest work Christ did was preaching the gospel and this same works he demands from is and expects us to do greater.
Mark 16:15
15And He said to them, Go into all the world and preach and publish openly the good news (the Gospel) to every creature [of the whole [e]human race].