If you don't think about it, you will never forget it. It means that you can hold back your thoughts for someone, but you won't forget each other after all. Reflects a person's helplessness and inner pain. Everyone has his own emotional experience and will experience something unforgettable.
When a love is over, it is easy to get together and leave. There is no need to dwell on past memories. We should live in the present with our feet on the ground and face the present and future life bravely. Only in this way can we live better and better.
Source:
This poem is from Su Shi's "Recalling Dreams on the 20th Night of the First Month of the River". The original sentence is "ten years of life and death, don't think about it, unforgettable."
Expressed Su Shi's yearning for his dead wife. Although ten years have passed, he has never forgotten his thoughts about his dead wife! Nowadays, it is often used to describe feelings for a person. Even if you let yourself not think about it, there is no way to forget it.
The author combines "unexpected" with "unforgettable" and reveals his inner feelings truly and profoundly by using the tension between these two seemingly contradictory mentality.