All the past is prologue, which means that once something happens, it has become the past. The extended meaning is to stop dwelling on the past, but to grasp the present and face the future. The "prologue" is the words written at the beginning of the article, not the main text, nor is it an important part of the article. Everything in the past is a prologue, which means to understate the past.

The past not only represents losses but also gains. Regardless of losses or gains, good or bad, they are all in the past. The original sentence is "Everything that passes is prologue." It comes from the beginning of Shakespeare's play "The Tempest" and is one of Shakespeare's famous quotes. This is a complete sentence that can be used in daily life and writing according to different contexts to express one's relief from the past and let go of the past mentality. It can also be used to persuade others to let go of the past and focus on the present and the future.