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In all one's lifetime it is oneself that one spends the most time being with or dealing with. But it is precisely oneself that one has the least understanding of.人生在世，和“自己”相处最多，打交道最多，但是往往悟不透“自己”。When you are going upwards in life you tend to overestimate yourself. It seems that everything you seek for is within your reach; luck and opportunities will come your way and you are overjoyed that they constitute part of your worth.人生走上坡路时，往往把自己估计过高，似乎一切所求的东西都能垂手可得，甚至把运气和机遇也看做自己身价的一部分而喜不自胜。When you are going downhill you tend to underestimate yourself, mistaking difficulties and adversities for your own incompetence. It's likely that you think it wise for yourself to know our place and stay aloof from worldly wearing a mask of cowardice, behind which the flow of sap in your life will be retarded.人在不得意时，又往往把自己估计过低，把困难和不利也看做自己的无能，以至把安分守己，与世无争误认为有自知之明，而实际上往往被怯懦的面具窒息了自己鲜活的生命。To get a thorough understanding of oneself is to gain a correct view of oneself and be a sober realist -- aware of both one's strength and shortage