"For one believes he may eat all things, but he who is weak eats only vegetables." Romans 14:2 NKJV
Apostle Paul started by talking about disputes over doubtful things. Truth is that there will always be these doubtful things; that's why there are quite a number of denominations and doctrines even though we all preach and teach from the same Bible. The problem, is that we let these issues divide us; we judge and condemn ourselves instead of simply minding our own businesses; true, some doctrines are clearly wrong and demonic, those we will oppose, but not all. Paul said to "Receive one who is weak in the faith, but not to disputes over doubtful things."
Now, notice that it is the one who doesn't eat that is called the weak one. While the one who eats is called the strong one. What's the difference between the two? Knowledge! Paul said, "I KNOW and am convinced by the Lord Jesus that there is nothing unclean of itself; but to him who considers anything to be unclean, to him it is unclean." The weak ones lack certain knowledge, as they become more informed they become stronger.
You've got to grow in knowledge. It's those who know that are strong and do exploits; it's those who know that are not easily deceived; it's those who know that live free of self guilt and condemnation; it's those who know that are not easily manipulated. Brothers and sisters, go for knowledge! I mean the truth! Because believing in a lie could be more dangerous than being ignorant and unaware of the truth. Desire the sincere milk of the word that you may grow thereby. And after a while, go from taking milk to eating strong meat! Yeah!