There has to be evil so that good can prove its purity above it. To live a pure unselfish life, one must count nothing as one's own in the midst of abundance.
Gautama BuddhaPain in life is inevitable but suffering is not. Pain is what the world does to you, suffering is what you do to yourself [by the way you think about the 'pain' you receive]. Pain is inevitable, suffering is optional. [You can always be grateful that the pain is not worse in quality, quantity, frequency, duration, etc]
Gautama Buddha