The reason we all like to think so well of others is that we are all afraid for ourselves. The basis of optimism is sheer terror.
The idea of my future simultaneously thrilled and terrified me, like standing at the lip of a very sheer cliff- I could fly, or fall. I didn't know how to fly, and I didn't want to fall. So I backed away from the cliff and went in search of something that had a clear, solid trajectory for me to follow, like hopscotch.
The teacher pretended that algebra was a perfectly natural affair, to be taken for granted, whereas I didn't even know what numbers were. Mathematics classes became sheer terror and torture to me. I was so intimidated by my incomprehension that I did not dare to ask any questions.