Set:
When I played high school basketball there was always one girl from another team that I hated to guard. Not because I was scared of getting beat or scared of doing my best, but because I knew she would push me to my limits. I would be asked to give everything I had in order to help my team win. I had to be sharp.
We need people in our lives to push us to make us better. If we surround ourselves with people who don't require us to give our best, we are being cheated. Going one-on-one with the worst player on the team won't help you get ready for the big game, and it's the same in life. Surround yourself with people who will challenge you and who will require you to be honest, trustworthy and faithful. Do the same for them.