1 There are only three days in one's life: yesterday, today and tomorrow. Yesterday is a thing of the past, and tomorrow has not yet arrived; We can't get back yesterday, and we can't have tomorrow in advance. We can only grasp today. We always think that today is the most important, and today seems to represent our life. If you don't grasp it well today, it will become a bad yesterday. Yesterday seems to be a withered yellow flower, which is not worth cherishing. Not to mention tomorrow, a "Song of Tomorrow" seems to be a waste of time, an excuse for inertia, and a driving force for us to do nothing. Of course, we should seize today, but we must never abandon yesterday, let alone tomorrow. It was yesterday that we climbed today's steps. Without yesterday, we wouldn't have today. Yesterday is an important part of today. Without a beautiful yesterday, there would be no rich and broad today; Without yesterday, today would be more monotonous and thin. What we have the most is yesterday, which has precious wealth, profound knowledge, profound thoughts, superhuman wisdom and material civilization necessary for a rich life. Yesterday is history, recording the trajectory of our life, success and failure, glory and shame, experience and lessons, depression and glory. Yesterday, he taught us like a teacher, guided us and let us breathe the air of wisdom. Yesterday was a mirror, and we could see the beauty, ugliness, right, wrong, good and evil in the world. Yesterday, like a missionary, he told us how to be a man and led us into a noble moral hall. Yesterday told us how to treat death and how to get a new life. Yesterday, we learned to recall, to think, to cherish, to forge ahead, to choose, and to understand the meaning of life and death. Tomorrow is an endless time tunnel. Tomorrow is empty and ethereal. But tomorrow is full of hopes, dreams and expectations. Tomorrow is mysterious. There are endless treasures hidden tomorrow, which need us to dig; There are countless opportunities for us to grasp; There are unexpected miracles waiting for us to create; There are many strange melons and fruits hanging, waiting for us to pick them. So tomorrow is our ideal highland, our happy paradise, our paradise, and the heaven given by God. Tomorrow may be the whole meaning of our life. Without tomorrow, yesterday will be ruins, without tomorrow, today will be the end. Today is short, erratic, impetuous, changeable and fleeting. But today is the most realistic and clear. Only by turning the erratic today into an accurate and concrete today can we create a huge and heavy yesterday and have a brilliant tomorrow. Yesterday is the foundation, today is the action and tomorrow is the plan. Without today, yesterday will not progress, and planned tomorrow will fail. Without today, we can't sail out of yesterday's harbor and reach the other side of tomorrow. Hemingway said that only when I know what to do the next day can I have a rest. If so, one set today yesterday and one set tomorrow. Our today brings yesterday and tomorrow. Yesterday was forever. Today and tomorrow will never meet us again, and we will freeze in a fixed yesterday. We are destined to live today, dream tomorrow and die yesterday. That's why yesterday was our real destination. Only by knowing yesterday and tomorrow can we know what today is. A person's life is only three days-yesterday, today and tomorrow. Yesterday belongs to the past, just a memory; Today belongs to the present and needs us to cherish it; Tomorrow belongs to the future, let's look forward to it. 265,438,000 years ago, the earth was still a wilderness, which we can call nature. Nature exists before our consciousness, and human consciousness has a considerable influence on the existence and development of nature. After a long period of purposeful and conscious productive labor, great changes have taken place in the face of nature. Wherever human beings go, they leave the mark of consciousness. It is really great to open up a way out in nature by hook or by crook! Yesterday, millions of years ago, small human settlements appeared in the wilderness. These settlements are obviously different from nature, whether they are caves where people live for heating or cities where houses and roads are built later. Everything in the world is developing and changing, so is human society. From eating animals and drinking blood to the Stone Age, from feudalism to capitalism, the formation and development of "society" is accompanied by "natural death", which is shocking. 100 years ago, that is, the last moderns of the great European explorer, the natural area decreased sharply and became a novelty. It is also for this reason that African exploration aroused human imagination in the19th century. Entering the real natural world will give you an unusual feeling, which most people who have lived in the artificial environment from coming to leaving this world will never feel. Today in the 20th century, great changes have taken place in the natural balance. In fact, people can say that nature has disappeared. Wild plants are cultivated in greenhouses, wild animals are put into zoos and hunting parks, and the artificial environment has become a souvenir of natural landscapes that used to abound. However, animals in zoos or hunting parks do not lead a natural life. Marxist philosophy tells us that any phenomenon will cause other phenomena, and any phenomenon will be caused by other phenomena-human beings' endless demand for nature for their own development directly leads to the imminent "death of nature". Today, we are surrounded by human beings and their creations, and there are "footprints" of human development everywhere. How about tomorrow? Nature may become a fantasy, a myth and an old dream in people's minds, which will never return. The world is an interconnected whole. From the inside of nature to the inside of human society, from the inside of human consciousness, from nature and human society to the objective world and consciousness, they are all connected as a whole. People can neither deny the objective connection between a thing and its surroundings, nor cut off the connection between yesterday, today and tomorrow. When we reflect on yesterday and examine today, should we also do something for tomorrow? If a person doesn't think about distant things, he will find sadness close at hand. Mankind has tasted the bitter fruit of the transition to nature. Let's do something today to return "nature" to future generations. Yesterday's human beings lit the fire that burned nature, and today's human beings are witnessing the death of nature. We don't know what will happen tomorrow. I hope that by then, green will not be a memory of yesterday, and the last drop of water in nature will not be our "tears". I hope the road of yesterday, today and tomorrow is not a natural road of blood and tears. . .