Both optimists and pessimists contribute to society. The optimist invents the aeroplane, the pessimist the parachute.
George Bernard Shaw
Optimism, that is healthy in its application, will inevitably result in better physical and emotional health.
I will say this about being an optimist – even when things don’t turn out well, you are certain they will get better.
The optimist already sees the scar over the wound; the pessimist still sees the wound under the scar.