Humility is a good thing.

In all this I feel a grave danger, the danger of what might be called cosmic impiety. The concept of ‘truth’ as something dependent upon facts largely outside human control has been one of the ways in which philosophy hitherto has inculcated the necessary element of humility. When this check upon pride is removed, a further step is taken on the road towards a certain kind of madness… the intoxication of power to which modern man, whether philosophers or not, are prone. I am persuaded that this intoxication is the greatest danger of our time and that any philosophy which, however unintentionally, contributes to it is increasing the danger of vast social disaster. – Bertrand Russell

Why you gotta act like you know, when you don't know. It's okay, if you don't know everything.