As Christians, we don’t know it all.
God tells us specifically about Himself and about who we are in the Bible. He tells us how we can be saved (justification). He tells us the best way to live and how to imitate Christ (sanctification). He tells us about our future to give us hope (glorification).
Make it a point to read God’s word, talk to Him about it in prayer, and follow His leading to put it into practice throughout the day.