When we fast, we do it to be delivered from temptation. We keep ourselves from those things we want. We deny ourselves. Most importantly, we do it for God. To have a closer relationship with Him, to know Him, and for God to reveal himself to us, and for him to cleanse us.
When fasting, pray, read and meditate on the word of God, and do it in your prayer room secretly to your Father, who will reward you for it. Great things happen when we fast.
Fasting is for ourselves, the word of God is for satan’s temptation.
Matthew 6:17-18 (KJV) – but thou, when thou fastest, anoint thine head, and wash thy face; that thou appear not unto men to fast, but unto thy Father which is in secret: and thy Father, which seeth in secret, shall reward thee openly.