Pentecost is a Holy Day God commands His people to observe and is the third annual “Sabbath” picturing the important steps in His plan of Salvation. Pastor John Strain elaborates in this sermon on the vital occasion of this “Feast of Weeks”: how it pictures both the pouring out of the Holy Spirit on Jesus Christ’s followers and the giving of the Ten Commandments at Mount Sinai, how that Spirit should work in our lives, and how we need it to grow and fulfill God’s purpose for us to overcome sin and develop holy, righteous character.