когда увидят ваше чистое, богобоязненное житие.
when they see the purity and reverence of your lives.
when they see your respectful and pure conduct.
as they observe your chaste and respectful behavior.
by observing your pure and reverent lives.
While they behold your chaste conversation coupled with fear.
when they observe your chaste conduct accompanied by fear.
having witnessed your pure conversation [carried out] in fear;