世間萬物的存在，必定有其存在的價值和意義，每一個事物的產生必定有其產生的根源，并非憑空而降。

Arsenic 砷

在古代，煉金家們用毒蛇作為代表砷的符號。砷的英語名稱“Arsenic” 一詞來源于阿拉伯語“Azzernikh”，意指砷的礦石——石黃，該礦石的拉丁文名稱是 auriPigmentum，意為“金色的染料”，英語中的 Orpiment（雌黃）一詞就是由這個字轉化來的。

The term arsenic was originally applied to the lemon-yellow mineral arsenic trisulphide, and its history reveals the reason: for its appears to be based ultimately on Persian zar ‘gold’ (related forms include Sanskrit hari ‘yellowish’, Greek khlōros ‘greenish-yellow’, and English yellow itself). The derivative zarnīk was borrowed into Arabic as zernīkh, which, as usual with Arabic words, was perceived by foreign listeners as constituting an indivisible unit with its definite article al ‘the’ – hence azzernīkh, literally ‘the arsenic trisulphide’. This was borrowed into Greek, where the substance’s supposed beneficial effects on virility led, through association with Greek árrēn ‘male, virile’, to the new forms arrenikón and arsenikón, source of Latin arsenicum and, through Old French, of English arsenic. The original English application was still to arsenic trisulphide (orpiment was its other current name), and it is not until the early 17th century that we find the term used for white arsenic or arsenic trioxide. The element arsenic itself was isolated and so named at the start of the 19th century.