What does Psalm 25:12 mean?

The Lord teaches those who reverence Him what His plan is for their lives. Faithful believers do not have to wonder what kind of life the Lord has carved out for them. The Bible contains plenty of instructions, warnings, and principles that are intended to steer us in the right direction (2 Timothy 3:16–17). We also have the guidance of the Holy Spirit (John 16:7–11).

Obeying God's Word is essential to a productive, effective life. When the Lord appointed Joshua to lead the people of Israel into the Promised Land, He told Joshua to meditate on the Book of the Law day and night and to be careful to obey it (Joshua 1:8). He promised that good success would result from Joshua's obedience to the Law. It is also important to commit one's body as a living sacrifice to God and to be transformed by the renewing of the mind (Romans 12:1–2). The reason for such a sacrifice of body and mind is stated in verse 2: "that by testing you may discern what is the will of God, what is good and acceptable and perfect."