比較N1
〜たる、〜たるもの
as a... / as befits... / being... (one must...)
Structure
N + たる；N + たるもの
Explanation
The literary attributive form of である (as being...). たるもの means as someone who is..., one must...; the main clause is an obligation.
Examples
政治家たるもの、常に国民の立場で考えるべきだ。
As politicians, they should always think from the people's standpoint.
彼は一国の首相たる人物だ。
He is a man worthy of being a prime minister.
Note
たる is the literary form of である. Common: 教師たるもの/大人たるもの, with べきだ/なければならない.