Buddhism says that what happened in the past cannot be changed, but you have immeasurable hope for the future. Where you want to go in the future depends on what kind of thinking you rely on.
You see Confucius, he lost his father at the age of three and his mother at the age of sixteen, and his youth luck was very unfortunate. Without the support of parents, it was very sad in ancient times. When he was fifteen years old, he was "determined to learn", worked hard for a few years, had an understanding of the whole way of sages, and wanted to be an official, you see him: from the age of fifteen to fifty, there was thirty-five years, he had no ambition, and no prince was willing to reuse him, he could be said to be alone.
From the history of Confucius, in fact, when he was 15 to 50 years old, he wanted to make a difference, and he wanted to resist his innate destiny and want to transform it. If I can't be an official, I must "know that I can't do it".
But after the age of fifty, you see that his thinking has changed, and he begins to know that a person has to "walk in a position." He believes that to practice ideals, it is not necessary to be an official. He knows the cause of his life, and he knows the destiny of heaven at fifty, and he knows that his cause should be engaged in education, and from education he should practice the ideal of "uniting the family, governing the country, and leveling the world", so as to achieve better results.
So the essence of life, we don't necessarily say how it is, you have to be how it is. We can't ignore the destiny driven by the karma of previous lives, and the point is - what kind of thoughts should you use to manage your life in your life! That is to say, your process is very important, and the Dharma does not focus on the result, it focuses on your process, which is your cause.
This place is talking about karma, which is to say that the flow of our lives is basically driven by karma, and it is our thoughts that produce karma.
So to put it simply, our lives are subject to different currents of water from our different thoughts.