Summary
This quote humorously implies that an optimist is someone who sees the positive side of everything, even situations that most people perceive as negative or bleak. By comparing them to a proponent of the idea that black is white, it suggests that optimists have the ability to view things in an unconventional way and find hope and positivity in what others might consider dark or challenging. It underscores the optimistic viewpoint as one focused on finding silver linings and not shying away from seeing light where others see darkness.