This despicable black cop had it too easy before, relying on violence to the extreme, so it made sense that he struggled to respond with composure when faced with difficulties.
No one taught him how to do it; he killed his own boss and guide with his own hands—Tonks was hateful, but was he really that bad to Glu?
"There is a common subconscious in the human mind which can roughly be understood as, before doing something, we always assess the future significance and value of the act, hoping to gain the motivation to carry on with our actions."
But Mr. Glu, reality is not so orderly, many things won't go your way, and being too entangled in risks and rewards will only hold you back. Pondering too much over action might not help your cause, it might even become a stumbling block.
So-called careful consideration won't necessarily enhance your action, nor is it directly connected to how smoothly things go.
