Hinduism by Swami Sivananda Synopsis:

The law of divine justice follows a mysterious course. In the world we come across many instances of virtuous persons undergoing endless suffering and pain; sinners perpetually enjoying pleasurable lives; indolents achieving success; hard-working persons meeting repeated failures; the wise suffering adversity; fools living in prosperity; egoists held in high esteem; and the righteous held in contempt. We find some persons born with silver spoon in their mouths and others facing one misfortune after another throughout life.