The pastor is calling the congregation to fast for 21 days to seek breakthrough. Fasting involves sacrificing something like food, TV, or coffee and spending that time in prayer and worship. The pastor believes their church needs breakthrough financially and spiritually. Fasting will help them position themselves to receive answers from God and experience a fresh outpouring of his power. Daniel fasted for 21 days and received understanding and breakthrough, so the pastor is encouraging the congregation to fast similarly to seek God's guidance and blessings during this challenging time.