To Change Others, Change Yourself.

You can actually become anything you want but you can't change others to your preferred way.

You can tell, advise, but in the end, there's a possibility that he will not change himself. Why?

Well that fact is that, you have no right to change others. To change others, you'll have to change yourself, and instill them into the person whom you want to change.

Calling others to change themselves is a selfish act and should be avoided. They have absolute right to not to listen to you and change in accordingly. They have the right to have their own way and personality which you have no right to alter it.