You must play Faithful action cards on their Zeal side.
When you play a Faithful action card:
You cannot declare ambitions this turn that have the Wisdom Ideal.
If you declare an ambition this turn with no Ideal, place an Ideal marker in its ambition box on the Zeal side.
In Act III setup, this Doctrine card starts on the side matching the Ideal with more markers on ambition boxes. On a tie, it starts on Wisdom.
Act: 2