Tonight, think of one thing you did not understand today. Do not try to solve it. Just notice where exactly it stopped making sense — the sentence, the step, the moment.
There is an old image from a Chinese monastery. A chick that is ready to hatch taps at the shell from the inside. At that same moment the mother bird taps the same spot from the outside. Neither tap opens the egg on its own. It works because they happen together.
So it is possible to be ready and still be waiting. The other tap has not come yet.
What are you tapping at, from the inside?
Not understanding something yet is not the same as being slow.