I would remind him that there is moderation in all things.
But it is the same as everything else: it is a matter of moderation in all things.
Or, to put it another way, moderation in all things, so long as it is not carried to excess.
I believe in moderation in all things—in food and in drink as well as in speech.
There should be such moderation in all things.
For most people, moderation in all things and a properly balanced diet is the most appropriate advice.
In the words of the old maxim, one might say moderation in all things.
My plea is a plea for moderation in all things.