When doing Apologetics it can all seem quite overwhelming at times. Frankly, none of us will really every grasp every aspect of apologetics in order to answer every question. In light of this it becomes easy to ask how can we know that Christianity is really the only truth and all of the other religions are wrong.
When I teach apologetics I start by teaching the reasons why we know Christianity is true, because, in the end, if we can show that Christianity is true than we have shown why all of the other religions are wrong.
Just like any part of life we know that two opposite propositions cannot both be true. This still plays out with religion, but for some reason people tend to forget that. If Christianity is true than Islam, Buddhism, Hinduism, Ba’hai, or anything else is wrong. This isn’t to say that those religions are wrong about everything, but in anything that they disagree with Christianity, they are wrong.
At this point, many of you may be thinking “well most religions basically say the same thing, so they could all really be true”. I’d challenge you to think that through a bit more. When you say all religions teach the same thing what do you mean? They teach the same moral values? Mostly. But even that really isn’t true, not every religion tells you to love your neighbor or care for the needy, Satanism doesn’t, and some groups of Islam don’t.
If we think about it this area of morality is really the only issue that most religions agree on. Outside of that they disagree on heaven, hell, creation, nature of God, nature of Man, Sin, Salvation and many other central truths. Even here some religions don’t just disagree on what these things look like, but disagree on whether these things even exist or not. Hinduism and Buddhism don’t believe in heaven, and Islam and Christianity differ greatly in what heaven is like.
Most importantly these religions vary greatly on how to achieve salvation, though they wouldn’t even all agree to the word salvation, or even the concept itself as well.
Saying that all religions teach the same thing is like saying that Republicans and Democrats are the same because they both believe we should do what is best for the United States, but we all know better than that.
Saying that all religions teach the same thing is like saying that Republicans and Democrats are the same because they both believe we should do what is best for the United States.
So do all religions teach the same thing? No, not even slightly. So how can we know that all the other religions are wrong? Well, if we know Christianity is true than all other religions would have to be false, at least in where they disagree with Christianity. So if you want to know what religions are false, the best place to start is finding what religion is true.