Be sure you know enough.
十分に知ろう。
Over the weekend, I learned how to use Adobe Photoshop at Lynda.com—quite intensively.
I sometimes used Photoshop in the past, and I thought I knew what the application is for. But I was completely wrong; what I knew about the application was just the tip of the iceberg.
As Goethe once put it, knowing is not enough; we must apply. But before that, we have to be sure whether we know enough about something we need to know. Otherwise, our creative capability would be quite limited than what it can be.