Bad things happen to good people all the time, for no reason at all. Life's cruelty is indiscriminate.
Life also doesn't care how much you've sacrificed or how hard you've worked. Just because you earned something or deserved it doesn't mean you'll get it.
Life can be cruel; there's just no getting around it. Bad things happen to good people all the time. You could be the most virtuous, generous soul on the planet and still get dealt a bad hand.
It's not fair, but it's reality. You can work hard your whole life and still end up with nothing to show for it. You might suffer a terrible illness or injury through no fault of your own. Someone you love and trust could betray or abandon you unexpectedly.
The world is indifferent to the suffering of individuals. As much as we like to believe in karma, there is little evidence that the universe bends toward justice or that good deeds are rewarded. While life has moments of beauty, joy, and connection, it also contains immense suffering, and there is no rhyme or reason for who experiences what.
As much as we try to avoid pain and suffering, it's an inescapable part of the human experience.
Heartbreak, grief, stress, anxiety, depression, loneliness, failure, rejection, guilt, regret—the list of sources for emotional anguish is endless. Our complex minds and relationships mean we frequently face mental and emotional struggles. The truth is, if you live long enough, you will experience deep emotional pain at some point.