God is a mystery because God's love is a mystery. Satan never perceived God's plan of redemption and salvation because it was fulfilled through love, and love is a mystery to satan. Love is a mystery that must be revealed by the Holy Spirit.
In this session Apostle Renny Mclean speaks on pastoral care. The Pastor is responsible for what the sheep eat, and the diet of the church is in his hands. A healthy church is based on the spiritual food given. You can not supply the needs of the people without the supernatural power of God.