Sadhu Sundar Singh preaches about the importance of spiritual vision and the true happiness that comes through the heart rather than mere physical sight. He emphasizes the need for believers to have a personal relationship with Jesus in order to truly know Him and experience His presence. Through various analogies, he illustrates how sin can hinder our spiritual perception and the importance of receiving the Holy Spirit to drive away the darkness of sin. Sadhu Sundar Singh also highlights the significance of loving God and others, understanding the spiritual language of the Bible, and seeking God's manifestation in nature with spiritual insight.

Sadhu Sundar Singh delves into the concept of sin, explaining that it is the act of disobeying God's will and choosing to follow one's desires instead. He emphasizes that sin is not a creation of God but rather a delusive and destructive state of being, leading many astray. Through the incarnation and redemption, God's boundless love is revealed, offering a way for sinners to be rescued from darkness and find eternal joy in heaven. Sundar Singh also addresses the misconception that salvation can be earned through good deeds, highlighting the need for repentance and a new life in Christ to bear lasting fruit and receive true peace and eternal life.

Sadhu Sundar Singh emphasizes the importance of prayer as a means to lay hold of God Himself, rather than just seeking material blessings. He explains that through prayer, believers can discover God's will for their lives and receive both spiritual and temporal blessings. He compares the life of prayer to breathing in the Holy Spirit, which fills believers with everlasting life and enables them to navigate the challenges of the world without being tainted by sin. Sadhu Sundar Singh also highlights the transformative power of prayer, illustrating how it leads to communion with God, spiritual growth, and the ability to overcome the world, Satan, and self.

Sadhu Sundar Singh preaches about the true meaning of service, emphasizing that service is the natural offering prompted by love and the activity of the spiritual life. He explains that in serving God and others, believers receive help from God as they use the faculties and powers He has endowed them with. Through various parables and examples, he highlights the importance of sacrificial service, readiness to give up one's life for others, and the need to use God-given gifts and talents to bring light and blessings to those in darkness and despair.

Sadhu Sundar Singh preaches about the remarkable Christ-likeness of his life, born into Indian culture and Sikh family. Despite initial despair and aggression, Sundar's encounter with Jesus led to a life of spreading love, peace, and rebirth through Christ. His experiences and visions in the spiritual world provide insights into life, death, and the afterlife, emphasizing the importance of repentance, humility, and spiritual growth.

Sadhu Sundar Singh preaches about the meaning and purpose of the cross, explaining that through Jesus bearing the cross, heaven was opened to believers, and by believers taking up their cross, they enter heaven and experience unbounded bliss. Pain and suffering exist due to man's rebellion against God's laws, meant to prepare them for an eternal home. God uses suffering as bitter medicine to promote spiritual health and awaken believers to their true home in heaven. The cross, though bitter outwardly, reveals spiritual peace and joy to those who bear it, just as Jesus shared in the sufferings of His followers to bring them relief and eternal safety.

Sadhu Sundar Singh preaches about the concepts of heaven and hell, emphasizing that they are states in the spiritual realm originating in the heart of man. He explains that true peace is found in communion with God and that desire is not to be eradicated but fulfilled by finding satisfaction in God. The sermon also touches on repentance, the cleansing of the heart by God's love, and the eternal joy and peace found in heaven. Sadhu Sundar Singh highlights the importance of the Holy Spirit's presence in bringing true happiness and peace to believers, contrasting it with worldly philosophies and emphasizing the need for spiritual harmony.

Sadhu Sundar Singh delivers a heartfelt sermon expressing deep gratitude and a desire to prove devotion through actions, acknowledging the transformative power of God's love that brings joy and fellowship. He humbly recognizes his own limitations and the all-knowing nature of God, emphasizing the need to love oneself in alignment with God's boundless love. Surrendering completely to God, he offers himself as a sacrifice for divine service, acknowledging God's sovereignty and his identity as a beloved child of God.

Sadhu Sundar Singh shares two visions he experienced while praying in the forest. In the first vision, he encounters his beloved Master who comes to bless and enrich him, leading him to realize his lack of insight. In the second vision, he rejects the temptations of a deceitful figure urging him to abandon his Christian faith for worldly recognition, choosing instead to remain faithful to his Master. Through these encounters, Sadhu Sundar Singh learns the importance of staying true to his faith and finding true fulfillment in God alone.