Simplest concepts are the hardest to grasp

So I've been wondering during finals week what it is that makes studying so hard. I mean if you think about it studying entails reading, writing, memorizing, applying, reviewing. These in themselves are all simple concepts but when brought together seem an impossible task. Then it hit me that studying really isn't hard. In fact if you paced yourself studying should actually just be more of reviewing since the material is already in your head you just got to dig it up. I being a procrastinator understand this yet can never seem to apply it.
YES the simple concept application.
Why is this one word such a hard habit to attain?
google defined application as "the act of bringing something to bear; using it for a particular purpose."

It seems so simple yet so profound at the same time.The act of bringing something to bear means that you are creating something with an end product in mind. So then does application also imply being goal oriented? Using it for a particular purpose... what if you don't know what that purpose is? how can you apply yourself to your own life if you don't understand what purpose you serve yet? so many questions come to mind when you think about application, yet it seems so simple on paper.

Back to the topic of studying. Yes when you study all you need to do is apply what you have learned through reading, lectures, writing, solving problems. But then you take a step back and you wonder about the word in general. Application is it really as simple as you think it is?
For that matter is any word as simple as it seems? I find that there is great meaning in words when used in the right way and through words your mind can be trained to think beyond what is in front of you to the grand scheme of things.

Lol after writing this i realize i did not touch on what I had originally intended which is how hard simple tasks are, but i think my tangent has lead to some thought provoking concepts. Ehhhh good enough for me =0p