For example let’s say person A is working for two years and they’re getting paid well but someone (person B) who’s been working for only a year just got promoted and now they’re getting paid more. Person A will be envious of person B. Another example there are many random occurrences in world; natural disasters, death, war, famine and illness. To the average human being when they hear of this they feel some type of sorrow/remorse for individuals going through these hard times which makes you sad. In Islam we have this one hadith that says imam (faith) fluctuates (your faith goes up and down). Within Islam and Arabic you’ll hear this word a lot “Dunya” when people say Dunya there are two meanings but they correlate with each other. The first meaning is this worldly world. The second meaning is the bottom of the bottom. Allah told the angles “look how much they worship me when I have them dunya, imagine what’s waiting for