Heard a good bit of story about Eugen Heligel (1884-1955), the German pholosopher who lived and taught in Japan between 1924 and 1929 or so. He taught philosophy at Tohoku U (in Sendai).
When asked by students "How many times have you read Kant's Critique of the Pure Reason?" he answered: 72 times, and I still don't understand. I am now reading it for the 73rd times.
How encouraging! Yes, the only way to break through the shell of older understanding is to keep re-reading a work infinitely.
Keep this in mind.