Mike Bickle emphasizes the beauty of God's heart, focusing on His gladness and humility. He explains that God's primary emotion towards believers is gladness, countering the common misconception that God is mostly mad or sad. Bickle highlights David's revelations in the Psalms, which depict God's presence as a source of joy and pleasure, and he encourages believers to embrace this understanding to deepen their relationship with God. He also discusses the significance of humility in God's character, illustrating that true beauty lies in God's servant heart, which invites us into a closer relationship with Him.