The depth of darkness to which you can descend and still live is an exact measure of the height to which you can aspire to reach.

The depth of darkness to which you can descend and still live is an exact measure of the height to which you can aspire to reach.

黑暗的深度，你可以下降，但仍然活着，是一个准确的衡量高度，你可以达到的愿望。

-- Pliny the Elder 老普林尼