A blog helps you solidify your thinking. But the practice of blogging is both a freedom and a constraint.
It's liberating to say whatever you want, even if no one reads it. How dare someone discovers you! At the same time, there's a fear that what's written isn't polished enough to be published.
But that's what blogs are: rough drafts. They're good enough. They are the blank piece of paper, a sandbox where people work out ideas. Blogs are full of contradictions and imperfections.
The fear is that your words may be wrong or misunderstood. No one likes to be called out. But that's also part of the excitement; the ability to catch someone's criticism.
Bloggers raise their hand before they are ready. They pick themselves, professionals, past success, or not. They have a long-term willingness to figure it out all out and change the world while no one notices.