It is a common mindset, especially in this postmodernistic world, mainly held by those who are not religious, but still believe in God. However, there are two fundamental issues with this mindset.

One, it assumes you know God said that. Ask yourself a simple question, “Did He?” If not, why are you saying it? If you believe in God, it’s only common sense to accept that God can say and do whatever He wants. If He says you’ll go to Heaven, you’ll go to Heaven. And if He says you won’t, well, what can you do? Same with His rules. If He says that we need to meet a certain criteria to be able to go to Heaven, again, who are we to argue?

Two, you are defining what’s “good.” You are defining it on your own; not what God has defined it as and that’s dangerous! This isn’t a trivial thing. This is eternal salvation or doom at stake! Thus, we can’t be lazy and not reevaluate the beliefs we have of God. You see, God’s definition of “good” in Islam is comprehensive. It involves the “good” between people, which include good manners, not lying, not stealing, not murdering, etc. That’s the “good” most people only think about. 

However, there’s also the “good” between the person and God. That involves obeying His rules, worshipping Him properly, etc. And this obviously requires searching for His true religion.

The question is, how did we forget this whole other aspect of good? Is it because we are illogical? Lazy perhaps? If God created us, doesn’t it make sense that we actually see His rules and then follow them? Why should He give you Heaven if you didn’t do that?

If you search for God’s true religion and perhaps decide that it’s Islam, then that requires actions such as praying, fasting in Ramadan, giving charity, AND yes, being good to people.