Mike Bickle emphasizes the grace of God in leadership as depicted in Zechariah 3:1-10, illustrating how God cleanses and empowers His people, despite their weaknesses and failures. He highlights the significance of Joshua and Zerubbabel as leaders who represent Israel's calling, and how God's grace enables them to fulfill their divine purpose. Bickle reassures that God's forgiveness and provision are available to all, encouraging believers to embrace their roles with diligence and wholeheartedness. The sermon underscores that even the smallest acts of service are valued by God, and that His intercession silences accusations against us. Ultimately, Bickle calls for a response of gratitude and commitment to God's calling, reminding us that we are all 'brands plucked from the fire' by His grace.