Reading through the story, how the Israelites came to that conclusion still baffles me. Without asking the sons of Anak, they concluded on their own they were like grasshoppers before them. A careful look at verse 33 shows that they came to that conclusion based on how they saw themselves. Our experiences will always catch up with our beliefs.
We pray and fast for a change in our circumstances and not see the change we desire, because the condition of our hearts has not yet been transformed. I guarantee you that they will quickly shrink to the size of our beliefs. What takes place in your inside plays a more significant role than your external reality. This perspective can change our entire lives. What you believe is what you see. The way of the Kingdom is always opposite of the way of the world (earthly systems) Joel 3:10. You are to speak what Heaven is saying irrespective of what the facts are.
It is also possible to make positive declarations, but even these are ineffective if the words that come out of your mouth are not aligned with the state of your heart. Jesus knew the importance of a change in belief system when he said; “For out of the overflow of his heart his mouth speaks” (Luke 6:45)
Do not allow your circumstances define who you are. Everything you experience is a result of your beliefs. Who do you think you are? The following are key areas to look at in changing your beliefs;