Christianity in modern times is characterized by many denominations. Why is that ? maybe due to different degrees of beliefs. How should we deal with this ? First i believe we start with ourselves. When God shows us more truth then we need to pay attention, or at least verify from the Bible.
Personally even as an old Christian i still found some things , habits, beliefs, or attitudes in my life that need correction , adjusting, or changing.
Since Satan led or decieved man to sin which bring us to death till Jesus came to our rescue. In our journey after being born again we still encounter challenges, roadblocks in our way to maturity.
In time some reach a level of maturity, and there is tendency to maybe relax or stop growing. But there could be danger in this, because the Bible says through apostle Peter, that the enemy is like a roaring lion looking or seeking someone to devour.
Let us remain humble and be on guard or vigilant till the end or till God calls us home.