Nothing happens in the kingdom without first a declaration (Bill Johnson)
God Himself gives life to the dead and creates things out of nothing by declaring (Romans 4:17). He does it in creation: we see Him in Genesis 1 declaring " let there be" light and then calling things by their name. God also unlocks prophetic destiny by calling out who people really are before we can even see any evidence of it in their lives. For example, God calls Gideon "a mighty man of valour, who will save Israel" when Gideon feels and looks weak... (See Abraham, Moses, Peter…)
Declarations are one of the most powerful transformation tools for renewing your mind, demolishing strongholds and leading your life towards God’s promises. For example if you feel weak, or are weak, take Joel 3:10 and speak out the declaration that you are strong with Christ in you. (In doing this you are not denying your experience but you are choosing not to agree with it as the ultimate definer of your identity).
Declarations are a practical tool to help you decide to agree with God’s words and not you current and past experience. By speaking declarations you partner with God in prophesying over yourself in order to believe God’s assessment, because faith comes by hearing. (Declarations are a wonderful tool to up-grade your believing in God’s promises and is a means of partnering with God to see the dreams He has given fulfilled).