Elon Musk makes $43 Billion offer for private buyout of Twitter

Aldi is actually a good example a for for the differences between a kind act and an act done out of selfishness. Leaving the quarter behind means you are thinking of others in the moment as where handing your cart to someone walking by is more of a selfish act, saving you from returning the cart.

I think many acts of kindness can be explained by compassion. Some people have lots of it , some have none. Boils down to how you were raised and life experiences. Compassion compels you to act.