This is one of those things we all have to pay constant attention to. None of us is "perfect" in this area.
You could attend Mass every Sunday, be avoiding most/all mortal sins, but still be a rather base individual (not "based", which would be a good thing).
Imagine how you would face the world if you were the son of a king. Think of how your ideals, standards, goals, thoughts, and aspirations would be much loftier. You would have to hold yourself to a much higher standard, etc. You would be focused mostly on *important*, or higher, things.