As an example, I spent a good deal of the mass last week frustrated with a parishioner who was wearing a hat during mass, not to mention jeans and a t-shirt. After all, he should be showing respect for the church by doffing his hat. It was all too easy for me to look down upon him as I was there in my dress shirt and tie. I needed to continually remind myself that it was more important that he attended than his wardrobe choices. I do not know what was on his mind, as perhaps his own troubles distracted him too much from remembering to take off his hat--and that he might have readily done so had he realized.
That was, of course, a rather superficial example. I have been endowed by my creator with numerous wondrous gifts that allow me to do many things much more easily than others who were given different gifts. I sometimes find myself thinking like the Pharisee "I thank you that I am not like the rest of humanity ..." even though I am most certainly a fallen human being. What hopefully differentiates me from the Pharisees (and any person or group of people) who were (or are) "convinced of their own righteousness and despised everyone else" is that I am still trying to do better.