How do we know God's work is accomplished by His Spirit?

Zechariah 4:6 declares, 'Not by might, nor by power, but by my Spirit, saith the Lord of hosts.' This foundational teaching highlights that spiritual accomplishments and breakthroughs in the church are driven by the Holy Spirit's power and not human abilities. Throughout scripture, we see that God's grace is the underlying source of strength for believers as they carry out His will. This principle serves as a reminder for the church to rely entirely on divine strength rather than human resources.