In Psalm 119:30, we read (NIV)
I have chosen the way of faithfulness;
I have set my heart on your laws
Since the Book of Psalm is the 19th book of the Bible, the identifier of Psalm 119:30 is 19+119+30=168, which is also the identifier of the Lord’s Prayer in the Gospel of Luke.
Conclusion: The Lord’s Prayer is the foremost petition to the Father to help us choose the way of faithfulness and set our heart on His Son’s Greatest Commandment:
Matthew 22: 36-40
36 “Teacher, which is the greatest commandment in the Law?”
37 Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ 38 This is the first and greatest commandment. 39 And the second is like it: ‘Love your neighbor as yourself.’ 40 All the Law and the Prophets hang on these two commandments.”