A.B. Simpson emphasizes the importance of having an attitude of faith and expectation when seeking blessings from God. He encourages believers to act and pray as if their requests have already been granted, trusting in God's provision and care. Just as a newly married woman adopts a new attitude, Christians are called to recognize Christ in the roles they have claimed Him for, such as Savior and Healer. Simpson reassures that we can bring all our cares to God, trusting Him in every moment, and that true faith culminates in a song of gratitude in the heavenly city. The sermon inspires believers to expect God to fulfill His promises in their lives.