The sciences are differentiated precisely on the basis of the particular contradictions inherent in their respective objects of study. Thus the contradiction peculiar to a certain field of phenomena constitutes the object of study for a specific branch of science. For example, positive and negative numbers in mathematics; action and reaction in mechanics; positive and negative electricity in physics; dissociation and combination in chemistry; forces of production and relations of production, classes and class struggle, in social science; offence and defense in military science; idealism and materialism, the metaphysical outlook and the dialectical outlook, in philosophy; and so on—all these are the objects of study of different branches of science precisely because each branch has its own particular contradiction and particular essence.

To a large degree, the measure of our peace of mind is determined by how much we are able to live in the present moment. Irrespective of what happened yesterday or last year, and what may or may not happen tomorrow, the present moment is where you are—always.Without question, many of us have mastered the neurotic art of spending much of our lives worrying about a variety of things—all at once. We allow past problems and future concerns to dominate our present moments, so much so that we end up anxious, frustrated, depressed, and hopeless. On the flip side, we also postpone our gratification, our stated priorities, and our happiness, often convincing ourselves that "someday" will be better than today. Unfortunately, the same mental dynamics that tell us to look toward the future will only repeat themselves so that "someday" never actually arrives. John Lennon once said, "Life is what's happening while we're busy making other plans. " When we're busy making " other plans," our children are busy growing up, the people we love are moving away and dying, our bodies are getting out of shape, and our dreams are slipping away. In short, we miss out on life.Many people live as if life were a dress rehearsal for some later date. It isn't. In fact, no one has a guarantee that he or she will be here tomorrow. Now is the only time we have, and the only time that we have any control over. When our attention is in the present moment, we push fear from our minds. Fear is the concern over events that might happen in the future—we won't have enough money, our children will get into trouble, we will get old and die, whatever.To combat fear, the best strategy is to learn to bring your attention back to the present. Mark Twain said, " I have been through some terrible things in my life, some of which actually happened. " I don't think I can say it any better. Practice keeping your attention on the here and now. Your efforts will pay great dividends.

China-Africa Cooperation Forum

民族凝聚力

cultural icon

创新驱动式发展

Toastmasters International

cast off illiteracy

He joined the army without first getting______from his parents,(permit)

他下班后做的惟一一件事就是躲在房间里看电视。(hole up)

microbe

B汉译英/B

key encryption technology

直译

The Wall Street Journal

Poly system theory

tax agent

全球化顾问

中国科学院

pairing-assistance