The day of Pentecost is marked by extraordinary signs and power, as recorded in Acts 2:1-11. When the Holy Spirit was given, a sound like a mighty rushing wind filled the place, fire appeared to rest on the apostles, and they spoke in languages understood by every person present in their own dialect. Jesus Christ, before His ascension, emphasized to His disciples the importance of receiving the Holy Spirit, declaring that this power would enable them to be witnesses of Him. Through the Holy Spirit, Christ's disciples were equipped to be lights to the world, demonstrating a way of life that glorifies God. Under the New Covenant, with access to the Holy Spirit, the quality of our witness must surpass what was expected of physical Israel. The Holy Spirit provides a witness of who we are and who God is, and if we allow it to lead us, we exhibit the characteristics of our Father, becoming a testimony to the world of His character and way of life. God has given us His Holy Spirit to fulfill His purpose, and a primary responsibility for those He has set apart is to be a witness to the world of His way of life. If we maintain a close relationship with the Giver of the Spirit, we have the means to be the true and faithful witnesses that God desires and commands His people to be.