You will teach people more effectively by being a good example than you will by telling them what to do.
The most important fact is that we must be perfect in our dealings and behavior. A great leader becomes most respected when his dealings are sincere to his preaches. Abraham Lincoln and Mahatma Gandhi attracted people more by their humbleness and kind nature. They lived as they told others to do. Thus it is conclusive that we must live as we preach and become role models to others.