Tell me it’s “common sense” when you know the reason

Common sense is often reason’s bitterest enemy. The moment you think “that’s obviously the way it should be”, you stop trying to ascertain the how, thus cutting out any possibilities of learning and improving the present status quo. Without the curiosity to understand why things are the way they are, there can never be progress.
Carefully weigh every thought that goes through your head, every thing you hear someone say, never stop being curious, and you will find yourself in a whole different state of learning and growth.