Sometimes the only way to get a point across is by example. Sometimes people need to see the results of your philosophies in your life before they will open their mind to considering them. I have a friend whose spiritual growth and development has skyrocketed over the past few years and he wants to take all his friends and family with him but they don't want to go and sometimes he gets so frustrated. He is still working with the idea that he has to lead by example.
Below is a link to an article by Yogi Dharma Mitra for Yoga Journal Magazine where he talks about leading by example.