唐朝诗人白居易说:“试玉要烧三日满,辨材须待七年期。”原意是,真玉烧三日不热,榆木和樟木要生长到七年之后始能辨认。诗人以此比喻世间人事之评定,须经历史考验,才能盖棺论定。从一定意义上,我们借鉴这个诗句来说明检验真理要经反复实践是很恰当的。真理是一个由相对到绝对不断转化和发展的过程,相对真理 Tang Dynasty poet Bai Juyi said: “Try jade to burn three days full, identification material to be seven years. ” The intent is true jade burning three days is not hot, elm and camphor to grow to seven years after the beginning of identification . The poet as a metaphor of the assessment of human affairs in the world, subject to the test of history, in order to rule the coffin. In a certain sense, we borrow this verse to illustrate that it is appropriate to test the truth through repeated practice. Truth is a process from relative to absolute conversion and development, relative truth