Prayer is an acknowledgment that our need of God’s help is not partial but total… Yet many of our church prayer meetings have dwindled in size and influence. Ultimately, the explanation can be traced to spiritual warfare. If, as the hymn writer says, Satan trembles when he sees the weakest saint upon his knees,” then we may be sure that he and his minions will be working hard to discredit the value of united prayer. The Evil One has scored a great victory in getting sincere believers to waver in their conviction that prayer is necessary and powerful.

Allistair Begg, Made For His Pleasure, Moody Press, 1996, p. 52.

The Bible doesn’t say, “Keep Yahweh’s commandments when you feel like you love Him,” or “Keep Yahweh’s commandments when things are going your way.” It says, “You shall keep [Yahweh’s] … commandments always.” God’s greatest commandments are about loving Him and others (Mark 12:28–31; compare John 15:12).
We love God and keep His commandments because He first loved us; we remember what He has done whenever things get difficult. And we teach it to the next generation. That’s what God has called us to.

John D. Barry and Rebecca Kruyswijk, Connect the Testaments: A Daily Devotional (Bellingham, WA: Lexham Press, 2012).