The quiet mind is a tight ship. Calm is a sign of effective self-management (not the lack of it). Blessed is a life of selective self-consciousness. The goal is to be loaded with large-caliber consciousness but to live day-to-day with the safety on.
Yes, I can think this or that thought through, but let's keep it as a latter-day resort. Let me permit myself immoderate self-consciousness only in cases when I can prove the necessity of self-defense! Living a grounded life, as a rule, is a necessary precondition for the exceptional instances that actively require me to stand my ego's ground! Let me have a good excuse for choosing to use deadly (over) rumination!