In this study on All That Jesus Taught, we examine Matthew 5:33–37 and Christ’s command that our “yes” must be yes and our “no” must be no. Jesus raises the standard beyond the Old Testament prohibition of false witness and calls His disciples to radical inner truthfulness empowered by the Holy Spirit, the Spirit of Truth. Through examples from daily life, the early church (Ananias and Sapphira), and warnings from Scripture, this message emphasizes that loving the truth is essential to spiritual protection and ministry. Those who refuse the love of the truth risk deception, but those who embrace it are prepared to stand faithfully for Christ regardless of cost.