What does the Bible say about the power of the Holy Spirit?

In Zechariah 4:6, God reveals to Zerubbabel the truth that the rebuilding of the temple and restoration of His people cannot be achieved through human strength or efforts, but solely through the power of the Holy Spirit. This signifies that all of God's work in our lives, from salvation to sanctification, is dependent on His divine empowerment. The Apostle Paul reiterates this concept in Galatians 2:21, emphasizing that if righteousness is sought through the law or human endeavor, then Christ's sacrifice is rendered void. True spiritual work is initiated, sustained, and completed by the Spirit of God, demonstrating the total dependency we must have on Him.