What is outside is harder to change than what is inside.
The more clearly we can see the walls of our life, the better. Even if it's only a psychological boundary, even if, deep down, we know that death will still enter without asking, it's comforting to pretend that we have everything under control.
It isn't the absolute truth about life and death, but the thing that helps us to live and confront the challenges of day-to-day life. It isn't what we learn from books, which serves only to fuel futile arguments about what happened or will happen; it is the knowledge that lives in the hearts of men and women of good will.
So long as you do no harm to another, change your opinion once in a while. Contradict yourself without being embarrassed. This is your right. It doesn't matter what others think -because that's what they will think, in any case.
Now and then, I have to stop writing and use a sharpener. That makes the pencil suffer a little, but afterwards, he's much sharper. So you, too must learn to bear certain pains and sorrows, because the will make you a better person.