I'm sorry, but that means nothing to me. I have no idea what "clarity of thought" means in this particular instance. Same for "design pillars", regardless of whether it's used at a high or low level.
For clarity of thought I mean if you decide to make a game you might want to work out what a game is to you. Like a mission statement that you can use as a razor to judge your subsequent ideas.
Design pillars are similar but about specific aspects of a game. A set of principles you can use to guide development.
