Three men were outside talking with each other one day, when the time for salatul dhuhr came in. It was a beautiful day and so they decided that they would pray outside.
They lined up; the imam in front, leading the prayer, and the two other men in a row behind him. The iqama was called and the prayer began.
Toward the end of the salah, during the last unit of prayer, a stray cat leisurely crossed in front of the two men in the back row. The first man said angrily, "Shoo, cat, shoo!" The second man said rebukefully, "You aren't supposed to talk during salah!", and a moment later the imam up front said smugly, "Ah, Alhamdulillah, I didn't talk."
Morals of the Story:
Seek Knowledge from "the cradle to the grave". The first man in the story spoke out of ignorance (and anger).
Worry about you and what you are doing (or not doing) to please Allah. The second man spoke out of a hasty desire to correct somebody else's wrongdoing.
Avoid arrogance like a snake because it tricks the bearer into thinking they are completely and utterly fine. The third man spoke out of an unconscious haughtiness that ultimately disqualified his salah though he was certain he was too great for that.
And lastly...pray in mosques when one is able?