Someone was talking eloquently about difficult people in his life. He came up with with some derisive digs at such people.
May I remind him that he need not search too far to spot such difficult fellows
A look at the mirror before him with some honesty and an open mind will be good enough.
He would meet the image of the most difficult person right in front of him.
One should not complain about a small speck of dirt sticking to the toe of someone else especially when he himself is standing neck-deep in a pool of dirt