“I pray this so that you will be able to decide what really matters and so you will be sincere and blameless on the day of Christ.”
Philippians 1.10 CEB
To decide is to determine, examine, or approve. What really matters comes from a verb meaning to distinguish or separate. It gets down to what is “essential” (Mounce).
Paul mentioned prayer for love and knowledge, v. 9. So both prayer and study are needed, as well as involvement with the church. Does this describe me?