As long as you are willing to learn Buddhism, you have read too many classics in a period of time, just like fatigue. This phenomenon is most likely to occur when you don't understand the classics and follow the script. Let it have a rest. Buddhism is a method of mind, not words. If Buddhist scriptures can't be absorbed, they are just words, and the more you read them, the more boring they become. Diligence is to cultivate your mind and get rid of your habits from time to time.