When you're going someplace you've never been you would check a map, plot a course and go. If you follow the directions you'll get there. If you go off on your own you may, or may not, get there but you will have expended needless time and effort.
I have found that this can apply in Spiritual things too. You hear the voice of God giving you a vision/direction. At this point you have a choice - to follow, or to continue going your way. You write the vision He's given you. Then you check His Word so you can begin on a solid foundation building your faith while traveling. Then you stand.
Without vision/direction you won't get where you're going. Without writing the directions down, or keeping them before your eyes, you'll veer off course and may end up someplace you didn't intend to go. Without direction you may just quit only to find out you were a block away!
Writing the vision/direction and referring to it continually allows you to assess how you're doing and determine if you're still on track! It also keeps it before your eyes and in your heart as a source of encouragement. (We know that God watches over His Word to perform it - Jeremiah 1:12, His Word will not return void - Isaiah 55:11, and no word from God shall be without power or impossible of fulfillment - Luke 1:37) If God said it, then it is going to come to pass! We must keep speaking His Word and focus on His promise, not our circumstances.
“And the Lord answered me and said, Write the vision and engrave it so plainly upon tablets that everyone who passes may [be able to] read [it easily and quickly] as he hastens by. For the vision is yet for an appointed time and it hastens to the end [fulfillment]; it will not deceive or disappoint. Though it tarry, wait [earnestly] for it, because it will surely come; it will not be behindhand on its appointed day.” (Habakkuk 2:2-3 AMPC)
Be Encouraged! ❤