A friend should bear a friend's infirmities,
But Brutus makes mine greater than they are.
_Bru._ I do not, till you practise them on me]
The meaning is this; I do not look for your faults, I only see them, and
mention them with vehemence, when you force them into my notice, _by
practising them on me._ (see 1765, VII, 77, 6)