I'm not 100% sure of the answer, but it would probably be that they use personal opinion rather than fact to back up their arguments.
Answer:
while one grows that person learns to love instead of hate and when that person has offspring then that person will teach the offspring to love instead of hate which will continue and shared with many more to come until the time comes to say good bye to everyone
Answer:
Have you ever thought that this might mean that you need to be true to yourself, like not trying to fake what you are?
But i believe it's a nice advice for modern world, as fake news, fake profiles and more are pretty common and it's hard to see if someone is trustful. For a great community there is a need of trusts and willing to be true, but if you see a community that enjoys hiding, then maybe this is a really wise advice.
If everyone was trustful, there wouldn't be any detective book.
Explanation:
If you're a person who believes in the sentence, it's easier to argue about it