Pastor Tim's sermon emphasizes the significance of expectations in various aspects of life, particularly in our faith journey. He stresses the importance of aligning our expectations with the reality of God's victory over evil and the ongoing spiritual battle. Through the imagery in Revelation, Pastor Tim illustrates the constant struggle between good and evil, highlighting the power of God over Satan. Ultimately, he encourages listeners to have faith in God's protection and provision, reminding them to stand firm with right expectations and trust in the ultimate triumph of Jesus.