A passage in the fish book makes it right: "We are such forgetful people. We don't even remember the memories yesterday that moved us to almost tears. It's like there is an eraser, erasing a little bit of the memory every minute. Fortunately, we still have words, word by word, to leave the memories of that year in detail."
However, now that I am an upright young man, the most sunny and energetic age, I should not recall it and be stained with the heavy air of twilight. Now, I should be bold enough to take risks and be fearless even if I am ignorant. I am indispensable for making mistakes, talking back, checking, and giving lectures. Now, I can only imagine the future and live in the present, without overly nostalgic for the past.