John Nelson Darby emphasizes that Christ serves as our spiritual food in three significant ways: as a redeemed sinner, in connection with our heavenly position in Christ, and as a pilgrim on earth. He illustrates that while the manna represents our sustenance during our earthly journey, the true nourishment comes from recognizing Christ as the Passover lamb and the old corn of the land, symbolizing our peace and glory in Him. Darby explains that our relationship with Christ evolves from fearing judgment to enjoying His love and grace, highlighting the importance of daily feeding on Him for spiritual strength and sustenance. Ultimately, he encourages believers to draw from Christ's grace in their daily lives, transforming trials into opportunities for deeper communion with Him.