Mockery is the prime weapon of the dark impulses within Man.
It is the most effective obstacle to prevent you from moving forward and upward—the thought that perhaps people will say, “Why are you behaving today differently than you did yesterday? Weren’t you good enough then? Are you really so great today?”
And the most powerful mocker is the one within your own self.
When you start something you know is good and right, and you hear a voice inside saying:
“Who do you think you are? Hypocrite! You know what you were up to just a moment ago!”
—know that what you did a moment ago is irrelevant.
All that matters is what you will do right now.
Any voice that holds you back from moving forward—no matter how justified it may sound
—any such voice is a voice of destruction and decay,
not of growth and life.

No, I can't think that we must suppress our inner critic because it is sometimes right. Better to judge what is the critic saying to us, then use our mature judgement to know if to proceed. or not. Self- doubt is a good thing instead of being impulsive and rash- in most instances. Yet, what the fragment is talking about is on doing things better than yesterday, and that inner critic argues that we are "not going to do that," or that we are "not worthy to raise to a better level of behavior. " That inner voice is then a trap not a counselor, and it is better to ignore it , and go ahead trying to improve despite the doubts. Those doubts are a natural part of being human, but we can transcend them to try to reach H'. The inner critic grew as part of the education we received: harsh parenting - then harsh inner critic. As we mature, time to use judgment . Yet, the critic it is also useful as a reality check -since life is not always a linear yes.