Once one has children, keeping one's calm becomes a natural and necessary desire. When looked at in this way, it bumps it up in the list of priorities to be dealt with.
What's Epicurean for "Amen!"
τῷ ὄντι! (tō onti)
how are τῷ ὄντι doing? - Textkit Greek and Latin Forums
Indeed! Really! In fact! In reality!
Amen is actually ancient Greek ἀμήν (amḗn), from Biblical Hebrew אָמֵן (ʾāmēn, “certainly, verily”) but I like τῷ ὄντι! for our purposes better.
Of course, there's always By Zeus!