This is a call for humility, a call for gracious love, and a sober reminder that even "the best of the saints have their failings." Ponder that last line!
We love a saint, though he has many personal failings. There is no perfection here. In some, rash anger prevails; in some, inconstancy; in some, too much love of the world. A saint in this life is like gold in the ore, much dross of infirmity cleaves to him, yet we love him for the grace that is in him. A saint is like a fair face with a scar: we love the beautiful face of holiness, though there be a scar in it. The best emerald has its blemishes, the brightest star their twinklings, and the best of the saints have their failings. You that cannot love another because of his infirmities, how would you have God love you?
--Taken from All Things for Good (Puritan Paperbacks), Thomas Watson