In this sermon, the pastor discusses the spiritual discipline of fasting as a key to experiencing 'mountaintop moments' with God. He emphasizes that Jesus assumed his followers would fast, stating 'when you fast' rather than 'if you fast' in Matthew 6. The pastor explains that fasting is the voluntary choice to abstain from food for spiritual purposes, creating space for deeper awareness of God's presence, humbling our souls, helping discern God's will, bringing divine favor, and giving power over demonic forces.