What's the best thing in life about believing in Jesus CHrist ? And the worst thing in life for an unbeliever?

I can answer both in the same sentence:

You can't really live until you've conquered death and that is only possible through Jesus.

The Kingdom of God is 'at hand'; so close you can touch it. Jesus is the real life time-space portal into it. He is 'the gate'. He is 'the door'. God's Kingdom starts this side of the grave.

"I am the way, the truth and the life. No one comes to the Father except through Me."

That exclusive statement by Jesus rules out establishments, traditions, regulations and all 'man-made' efforts to get to God, and therefore ultimately, heaven.

One God, only one way to Him.

The way is a person, not a religion

The best thing about believing in Jesus Christ: Many people doubtless find comfort in religion.

The worst thing in life for an unbeliever: Putting up with the well-meaning, but extremely annoying, people who believe in Jesus Christ.

There are plenty of bad things in my life, now that I'm an unbeliever. But the BEST thing in my life when I believed in Jesus Christ was my debilitating terror at the prospect of going to hell.

I'm only qualified to answer from the unbeliever perspective, but the worst thing is how many people out there actually need convincing that we can be moral or trustworthy since we don't believe in a god.

The worst thing for an unbeliever is when a fanatical believer passes laws that restrict the rights of others.

With Jesus I have a crutch with which to refer when I find myself backsliding into habits I don't want in my life. I look up in my mind to Jesus and He looks back down on me and pretty much laughs at me for being so stupid to get myself into situations that need His help. You would think I was older than that. But no, I fall back into immature living at times and then need His help to remind me. I don't know what or how others who don't have that solve their problems. I suppose they have their way out of things too. Probably have to never let themselves fall into immaturity like I do. The fall would be unforgivable.

Believing in God is a choice to commit one's self to obeying Him. I'm implying that a believer can be religious or not. There was a movie "Oh God" in which God selected a good non religious person as His messenger. The best thing about believing in God is that you are obeying His commandment that requires you to not neglect those in need. That alone is the reason to believe.

clearly there is no best or worst thing since there is ZERO evidence that jesus ever existed he was invented by the romans in the 3rd century as part of their adoption of christianity similarly there are no records of the apostles , joseph or mary ever living , there is no such thing as an "unbeliever" just people who research the facts

That you have been brainwashed and flat out lied to your entire life, why do you keep eating it up? Because again you got brainwashed from an early age its obvious.

Jesus didnt exist.

TRUTH is that Christianity is the cult of BABYLON, and the Catholic Church who fabricated the Jesus story is the mother of whores, and people like FB will burn in hell for equating Jesus to GOD.

And anyone and everyone who refuses to listen unto me will burn in hell for ever.