It is one of the severest ...

It is one of the severest tests of friendship to tell your friend his faults. So to love a man that you cannot bear to see a stain upon him, and to speak painful truth through loving words, that is friendship.
It is one of the severest tests of friendship to tell your friend his faults. So to love a man that you cannot bear to see a stain upon him, and to speak painful truth through loving words, that is friendship.

Quotes from the same author

Every artist dips his brush in his own soul, and paints his own nature into his pictures.
We should not judge people by their peak of excellence; but by the distance they have traveled from the point where they started.
There is no friendship, no love, like that of the parent for the child.
No man can tell another his faults so as to benefit him, unless he loves him.
When a man sells eleven ounces for twelve, he makes a compact with the devil, and sells himself for the value of an ounce.