Matthew 16:19 “I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven." (NIV)
These words of Jesus, were instructions given to his disciples, including us, on how to operate in God's authority and power. Understanding “binding” and “loosing” changes the way we pray. It increase the power and confidence that we have when we pray, so that we will see the results that God puts in our heart.
You can't have a kingdom without a king. And the job of the king is to rule with authority. So, Jesus literally means that He wants to give us the ability to unlock His authority so that we can help Him rule on planet earth.
The English words bind and loose, mean to tie up or untie. The original Greek words for bind and loose, mean to “forbid” or “permit". So to “bind” means to forbid or shut down the work of satan, and “loose” means to permit or release the work of God.
Jesus has literally given us the authority to forbid things and permit things through our prayer, and in doing so extend His rule on earth.