Right Life

 Just because those who have not lived right lives decide to live right does not mean that they can live right. It's as if a man who is 172 centimeters tall cannot live that way because he decides to live 180 centimeters.

 The difference between above two is that they cannot change their heights, but they can change their life. The problem is that most people are indifferent to life. Even if they are interested, it's too hard to find a way to change life. And even if they learn the way to change life, it is too difficult to actually do it.