If you want to tell me "I haven't thought my worldview through", simply explain to me how other people see my own. As a Christian, I know all too well that there are people on this Earth who do not agree with me on most things. Indeed, my Bible tells me that the road that leads to life is narrow, and few find it, and that the road to destruction is broad, and many find it (Matthew 7:13-14). Therefore, in order to believe my religion is true, I have to believe many people will think it isn't. Indeed, if everyone agreed that it is true, that would be conclusive proof to me that it isn't.
But you don't even have to be a Christian to see the flaw in this logic. Any human being who has ever encountered another human being knows that even the most gullible of human beings will, at some time or another, find themselves at odds with another person's worldview. It's not even a case of black vs. white. The devil's house is more divided against itself than the Church has ever been.
I firmly believe that if you were to do a comprehensive study on the human race, you would never find more than 75% of them agreeing on almost any statement. They may agree on "we exist", but that is about it. They won't all agree on the existence of God, they won't all agree on the specifics of who that God is, they won't all agree on how we relate to Him.
But none of that matters, because truth does not require the human race to be unanimous. Nor is truth a Democracy. Nor is truth subject to individual approval. Think about it this way: There are people in this world right now who do not believe cancer exists. But try telling that to a doctor. Try telling that to someone diagnosed with the deadly disease. "Not everyone agrees that you have cancer". Well great! They're cured!
When their earthly lives are threatened, even the most hardcore Relativist receives a painful reality check. It is when the dangers we face finally reveal themselves that we become most painfully aware that denial solves nothing.
But all too often, we act like it does. When the danger is far off, too far for us to perceive, we do not worry. "Prevention is better than the cure", we are told. But we laugh off the idea that there is anything to prevent. If you need proof of this, look no further than the phrase "ok boomer". "Ok boomer", we say, shrugging off the most sincere warnings of our elders, as if they can teach us nothing. As if their experience didn't bring them wisdom. As if we can't learn from their mistakes.
In the same way, it is all too tempting to just shrug off the danger to our eternal lives. After all, we tend to assume, unless we are in one of those tragic situations where death is clearly approaching, that if there is an afterlife, we have plenty of time to prepare for it. But it is positively asinine to believe any person, any group, even the entire human race, is any more capable of affecting the reality than we are of affecting this one. We cannot cure cancer with the flick of a tongue. How much less can we save even one soul from the fires of Hell?
The irony is, belief really can affect the afterlife. Not everyone agrees, but then not everyone is right to disagree. See, although God has seen fit to distance Himself from us, He did not leave us with many valid alternatives. As He says in His word, "For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who suppress the truth in unrighteousness, because what may be known of God is manifest in them, for God has shown it to them. For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened. Professing to be wise, they became fools, and changed the glory of the incorruptible God into an image made like corruptible man—and birds and four-footed animals and creeping things." (Romans 1:18-23).
We are without excuse. We can look at a house, and we can say "no one made this", but sooner or later, we must confess that there is a builder. In the same way, when we look at our world, we can only conclude that there is a supreme intelligence behind it. And most of human history reveals that we instinctively do. As our stubborn hearts darken, and God gives us over to reprobation, atheism becomes more popular, but even they show a God shaped hole in their hearts.
But He didn't just leave us stumbling. Beyond all imagination, God actually stepped into history, culminating with the incarnation of His Son through the womb of a virgin. With His many miracles, Jesus proved beyond reasonable doubt that God sent Him, and He, being the exact image of God (Hebrews 1:3), revealed the Father to us. And we killed Him for it. Our deeds being so dark, we hated His light, and so we beat Him to a bloody mess, nailed Him to a cross, and hung Him to bleed out and suffocate until His heart ruptured.
But He didn't stay dead.
This was all according to God's plan.
One thing no one can reasonably deny is that we are all sinners. Not one person can stand before God and say "I have kept all your laws, I have always done your will, I have never once failed to love you". That is, except one. One man in all of history can honestly say "I never sinned". This same Jesus, who died and rose again. For what reason did He die? Because we deserve to. We deserve the full, everlasting wrath of God for every evil deed, every idle word, even every reckless thought. The depravity of our heart merits an eternity of punishment. And standing alone before God, we would assuredly receive it.
But Jesus didn't deserve it. Therefore, He would not receive it. But He did! Rather than finite beings receiving an infinite punishment, the eternal Son of God suffered a finite punishment. Now, all humanity can be saved.
But there is a condition. Faith. One must repent of the sin that brought us death, confessing Jesus as the Lord who died and rose to bring us everlasting life. "Not everyone agrees". Well, not everyone will receive that everlasting life. The question you have to ask yourself is which side of that error do you wish to be on. Are you going to let "everyone" drag you down into the pit prepared for the devil and his angels, or are you going to follow the one man who conquered death itself? For me, the answer is easy: It is better to trust one man who walked out of His grave than 8 billion who are heading to theirs.