The black dot.

Once the wise elder gathered his disciples and showed them an ordinary sheet of paper, where he drew a small black dot. He asked them: 
"What do you see?" 
All answered in chorus that it was a black dot. The answer was not true. The elder said: 
"Do you not see this white sheet of paper - it's so huge, more than this black dot!" That's how it is in life: we see something bad in people first, although much more good. And only a few see at once  the "white sheet of paper."