即“對(duì)立統(tǒng)一規(guī)律”,是唯物辯證法的根本規(guī)律。它揭示出一切事物都是對(duì)立的統(tǒng)一,都包含著矛盾。矛盾的對(duì)立面又統(tǒng)一,又斗爭(zhēng),并在一定條件下互相轉(zhuǎn)化,推動(dòng)著事物的變化和發(fā)展。對(duì)于任何一個(gè)具體的事物來(lái)說(shuō),對(duì)立的統(tǒng)一是有條件的、暫時(shí)的、過(guò)渡的,因而是相對(duì)的,對(duì)立的斗爭(zhēng)則是無(wú)條件的、絕對(duì)的。?