What you think is a setback, is really a set-up for a greater comeback!
I'm going to let God be the judge of who goes to heaven and hell.
There may be times when you just have to love people from a distance.
Do not speak defeat, speak victory.
A disagreement or incident involving someone who's not that important to you, like a guy who cut you off in traffic or a rude cashier, is something that should roll off your shoulders. Save the effort for resolving conflicts with the people you cherish.
I always try to put a seed of hope into people's hearts. I'm not there to teach them doctrine necessarily, but to let them know that God is a good God, and has a plan for their lives. Hopefully, that will restore their faith, or draw them into faith.