When man sinned, God had a problem. God is not only love, God is also just. He has to punish sin. We are all sinners. We have all done things we shouldn't have done, and not done things we should have done.
God's infinite justice demands that He punish our sin. God's infinite love wants to find a way to avoid punishing us. The only way round the impasse would be to find someone who was without sin who would take our punishment for us. Someone who voluntarily chose to do that.
That someone was Jesus, who came down from heaven, lived a life that was without sin, then allowed His life to be taken in your place and mine.
The greatest fallacy that man believes is that he is good enough to be forgiven - good enough to get to heaven. That if he does enough good deeds, the bad deeds will be overlooked, and he will somehow be allowed in. It isn't true. If man has sinned against an eternal God, he deserves eternal punishment. Heaven is perfect. Heaven is where God is.
Jesus said "I am the way, the truth, and the life. No one comes to the Father except through me" (John 14:6). That's because it's true.
If it were possible to get to heaven by any way other than by trusting Jesus, then God had Him die for nothing.
But here's the thing. God loves us so much that He won't force us to accept Christ. Despite all that it cost, He holds out the offer, but gives us the right to refuse.
The choice is yours - and mine.