"And the Lord answered me, and said, Write the vision, and make it plain upon tables, that he may run that readeth it." (Habakkuk 2:2, emphasis mine)
"Make it plain". Legible. Easy to be understood. Things that, while they have a complextiy borne out of a different dimension, only take the heart and humility of a child to understand and appropriate. To ingest.
When God speaks to you, how do you react? Do you have trouble believing that any voices you hear are Him? How do you hear the Lord? A sweet, soft intimation to your heart? What about through circumstances and people and time and place? Because if you want to hear it, He'll make sure He gets through. It might take some time and we may need some realignment in our expectations, but God will get His point across.
"The salutation of Paul with mine own hand, which is the token in every epistle: so I write." (2 Thessalonians 3:17)
It's a good idea to write out the stirrings of what God is doing in your heart and life. While they may not make sense at the time--much like a dream upon waking, God will fill in the words with His meaning or else reorient your understanding along their lines. How often would we read the Bible and gain a fresh insight only after living through a certain season? The words you get are what you need for the night.
I find that writing is an act of humility. We think we're so smart. We think we'll remember everything. I guarantee you you'll forget. The still, small voice of the Holy Spirit is so gentle as to be nigh imperceptible to the untrained ear. But you did hear it. If that was the only time He was going to speak on a matter and you forgot!? Gasp. Don't let that happen. Grab the nearest writing implement and get to work! God has so much to say on the matter that we'd best be listening.
Writing is cathartic. I don't know how many times I've sat down to journal a dream. And then the mere adjective that comes to mind in describing the situation in my sleepy head was the key. The key to understanding a crucial aspect of what God was seeking to show me with said dream. Had I not written it plain I wouldn't have gotten the insight He wanted me to have. There's good reason for alphabets and language and the whole spectrum of writing. What it means. What it does. What it's for. It's a miracle.