Fasting is a time of contemplation. A time to humble yourself before God. A time to search yourself and confess attitudes and actions that are contrary to the nature of God. Those we commit that we should not and those we omit that we should do. The more we understand God's nature, the more humbling and meaningful our expressions of love and worship can be. God is one. He is unique and indivisible, as these verses bare witness:
Moses: "Hear, O Israel! The LORD is our God, the LORD is one!" (Deuteronomy 6:4)
Jesus: "The foremost is, 'HEAR, O ISRAEL! THE LORD OUR GOD IS ONE LORD.'" (Mark 12:29)
Paul: "Now a mediator is not for one party only; whereas God is only one." (Galatians 3:20)
James: "You believe that God is one. You do well; the demons also believe, and shudder." (James 2:19)