C.H. Spurgeon reflects on the journey of faith and the dangers of false doctrine in his preface to the 'Sword and Trowel.' He emphasizes the importance of adhering to the true gospel, warning against the perils of the New Theology that cannot save souls. Spurgeon expresses gratitude for the support of friends and the ongoing work of the Orphanage, College, and Evangelists, while urging unity among believers to combat error. He acknowledges the loss of friends and the need for new supporters, encouraging readers to spread the word about the magazine. Ultimately, he calls for fervent prayer and solidarity in Christ's mission.