Paul Graham, in his essay on essays, makes a beautiful insight on why we should bother writing anything:

“Expressing ideas helps to form them.”

The more I write, the more I get this. I’ve experienced this many times, ephemerally, and this sentence captures my intuition perfectly. To me, this means:

If you have a thought in your mind, write it.

If you have a picture in your mind, draw it.

If you have a song in your mind, compose it.

If you have a design in your mind, build it.

The journey of doing it, whatever “it” may be, will crystallize, expand, and perhaps completely transform what you see in your mind’s eye.