No one is an island but you could survive on one (Self reliance)

Mockery and sarcasm cannot pierce the strong armour of the self-reliant person.

These are beaches that no invading force can land on for the self-reliant person is unreachable by comments without merit.
The sharp arrows of insincerity may rain upon them but they will just laugh as the arrows are deflected by the armour of self-confidence and fall harmlessly around them.

How to improve your judgement

To get rid of prejudice is a great triumph. Prejudices piles obstacles in a person’s way, obstacles to health, success, happiness and prosperity so that they are always running into imaginary enemies who, when prejudice is removed, are seen to be allies.

To acquire impartiality, a person must humble their ego which prevents them from seeing anything from any point of view other than their own….