I have often referred to two powers on this earth that outdo all the others. The first one is the power of forgiveness and the other is the power of agreement. Of this latter it has been said of old that where two be agreed together, the thing agreed upon shall be established. What that statement is saying is that it is possible to bring into existence the thing agreed upon.
Let me illustrate this in a simple way. I have a table that I need to move but it is a task to big for me, so I ask for your help. You agree to help me and now what was not possible to do (by myself) suddenly becomes possible. You pick up the one side of the table and I pick up the other side and together we move the table. The thing we agreed upon has occurred.
Fire is an extremely destructive force. In mere moments a complete building may be in flames and beyond salvaging. It may have taken a long time to complete the construction of this building. The forces used took much energy including the force of agreement, for someone coordinated with a tradesmen times and materials to construct the building.
In the same way doubt is an extremely destructive force. In mere moments it can destroy the potential accomplishments of an agreement. Doubt refuses to acknowledge that there is an unseen realm. It refuses to accept anything other than facts. It calls into question the validity of a matter. 'Show me the facts and I will believe it' is a common statement, but you need not believe if you already have the facts. Therefore doubt destroys the agreement. If you doubt the thing agreed upon will be established, it immediately removes its possibility.
The first message Jesus gave was simple. "Seek the kingdom of heaven before anything else and also its righteousness, which is simply our alignment or our response to this kingdom's constitution. He adds to this priority by saying that all the things that we normally place as most important, such as water, food, clothing and shelter, etc., will be added because the Father knows that we need them. He kept that in mind so to speak when He first created this world. When we come into agreement with what Jesus told us in that first message of His, we will reap the full benefits of what He said. The thing spoken of will be established. If however we allow doubt to use its destructive forces, we will lose out on its effectiveness and we will be back to placing priority on the needs to survive such as water, food, etc.. Doubt will do that to us, for it refuses to accept anything of the unseen. The unseen can only be accessed through faith. Faith will see with inner eyes and look at that which natural eyes cannot see and then call it into existence. The agreement immediately establishes the thing agreed upon but there is a time and action element that may delay the existence in the natural.
Be careful with doubt, for it will take an agreement or contract or a plan or a vision and tear it up and make it null and void.