Sentence:  It is affirmed, that <WSD>individuality</WSD> pervades universal nature; that it is positively the most fundamental and universal principle which the finite mind seems capable of discovering, and the best image of the infinite. There are no two objects in the universe which are precisely alike. 
Meaning of the word marked with <WSD> tags:  The characteristics that contribute to the differentiation or distinction of someone or something from a group of otherwise comparable identity.