A friend should bear his friend’s infirmities

Cassius
A friend should bear his friend's infirmities;
But Brutus makes mine greater than they are.
Marcus Brutus
I do not, till you practice them on me.
Cassius
You love me not.
Marcus Brutus
I do not like your faults.
Cassius
A friendly eye could never see such faults.
Marcus Brutus
A flatterer's would not, though they do appear
As huge as high Olympus.