Mike Bickle emphasizes the prophetic significance of Joel 2:28-32, highlighting the promise of a global outpouring of the Holy Spirit that will occur in the last days. He explains that this outpouring will be accompanied by signs and wonders in the heavens and on the earth, serving as a call for believers to engage in corporate prayer and fasting. Bickle stresses the importance of calling on the name of the Lord, which leads to deliverance and salvation, especially in times of crisis. He encourages the church to cultivate a lifestyle of prayer and prophetic ministry, as these will be crucial in the end times. The sermon serves as a reminder of the urgency to prepare for the coming awakening and the return of Christ.