The quote above uses “restraint” as an alternate translation for “discipline” but, not knowing the Pāli, I choose discipline because it seems to convey a more additive meaning. In other words, restraint seems to denote a subtracting of action, a holding back whereas discipline implies something undertaken that’s above and beyond the normal. For me, discipline speaks to going against the stream of quotidian and mundane inertia. Which do you like better?
Cattāri Brahmavihārā 
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