Humility is the opposite of conceit. Jesus is our model for that. He was the humble servant. It is His example we must follow remembering that everything that we have is given to us by Father God who asks us to use ALL our gifts for His glory, not ours.
Most of us get on well with those who think and act as we do, those of our own or a similar culture. But to be a Living Sacrifice means that we have to work at some things, and living in harmony with one another is probably one of them.
Many of us are wrong, but in the opposite direction. We think of ourselves as a nobody really having very little effect in the world around us. God loves us, but we can not do anything to change His world, we just try to be good and not upset anyone.
EN 
FR