Most advances in science come when a person for one reason or another is forced to change fields.
You must not lose faith in humanity. Humanity is an ocean; if a few drops of the ocean are dirty, the ocean does not become dirty.
As soon as you trust yourself, you will know how to live.
Obscurity is a good thing. You can fail in obscurity. It removes the fear of failure.
There is only one success - to be able to spend your life in your own way.
For the most part, fear is nothing but an illusion. When you share it with someone else, it tends to disappear.
To repeat what others have said, requires education; to challenge it, requires brains.