I'm always described as 'cocksure' or 'with a swagger,' and that bears no resemblance to who I feel like inside. I feel plagued by insecurity.
Anyone who acquires more than the usual amount of knowledge concerning a subject is bound to leave it as his contribution to the knowledge of the world.
Rather, for all objects and experiences, there is a quantity that has optimum value. Above that quantity, the variable becomes toxic. To fall below that value is to be deprived.