"Whatever course you decide upon, there is always someone to tell you that you are wrong. There are always difficulties arising which tempt you to believe that your critics are right. To map out a course of action and follow it to an end requires courage." —Ralph Waldo Emerson
Remove that “someone” and the “wrong” is removed. Difficulties arises from what “critics” believe but not what “you” believe.
Like the penguins traveling deep into the freezing Antarctic nothing telling him or her it’s cold.