D.L. Moody discusses the three groans found in Romans 8, emphasizing the groan of creation as it longs for redemption, the groan of the believer who yearns for spiritual fulfillment, and the groan of the Holy Spirit interceding for us in our weaknesses. Each groan reflects a deep desire for restoration and connection with God, illustrating the profound relationship between creation, humanity, and the divine. Moody encourages believers to recognize these groans as part of their spiritual journey and to find hope in the promise of future glory.