The fuck do I know about grit? When was the last time someone living in the stinking suburban wasteland of America had to have courage? It is a dark road ahead for us all, though; and, to paraphrase yet another piece of popular media because originality: this country is dark and full of terrors.
The amount of time you spend forming an argument or perfecting a thought will always be overshadowed by the amount of time available to everyone else to the ends of picking apart your well thought out processes and forming an argument against you. This is not to discourage you; forming opinions is vital to our species. Just prepare yourself for the inevitability that somebody, somewhere, at any point in time, for whatever reason, may have a disagreement with you.