The central message of this sermon is that faith, specifically the kind that trusts in God's power and authority, is a crucial aspect of the Christian life. According to Jesus' teaching in Matthew 9:27-30, faith is not about knowing or expecting a specific outcome, but rather about trusting that God has the power and ability to do what we ask of Him. The sermon highlights two instances where Jesus was amazed by great faith - the centurion's request for healing without Jesus' physical presence and the Canaanite woman's persistent plea for help despite being rejected initially. These examples illustrate that faith is not about our own abilities or efforts, but rather about recognizing God's power and authority to act on our behalf. The sermon encourages listeners to focus on cultivating great faith, which releases God's power in their lives, rather than trying to measure or quantify their faith with metrics such as prayer time or charitable giving. Ultimately, the takeaway is that faith is a vital and essential aspect of the Christian life, and it is more about trusting in God's ability and character than our own efforts or expectations.