For instance, consider the substance of copper. Were it to be protected in its own mine from becoming solidified, it would, within the space of seventy years, attain to the state of gold. There are some, however, who maintain that copper itself is gold, which by becoming solidified is in a diseased condition, and hath not therefore reached its own state.
“مثلاً در مادّه نحاسی ملاحظه فرمائيد که اگر در معدن خود از غلبه يبوست محفوظ بماند در مدّت هفتاد سنه به مقام ذهبی می رسد. اگر چه، بعضی خود نحاس را ذهب می دانند که به واسطه غلبه يبوست مريض شده و به مقام خود نرسيده.”