What does the Bible say about striving lawfully as a Christian?

In 2 Timothy 2:5, the Apostle Paul emphasizes that while pursuing mastery in the Christian life, one must strive lawfully. This concept implies that there are rules and guidelines provided by God through Scripture, which govern the life of a believer. Striving lawfully is understood beyond mere compliance with the Ten Commandments; it encompasses the entire blend of doctrine and life guided by the Holy Spirit. The believer is to engage in spiritual battles against sin and the influences of the world, represented metaphorically as a soldier or an athlete. Such lawful striving involves recognizing one's spiritual condition and reliance on the Holy Spirit.