A motive is the reason behind why someone does something, especially when their actions seem puzzling or important to understand. When a detective investigates a crime, they search for the criminal's motive: Did they steal because they needed money? Did they lie to protect a friend? The motive explains the “why” behind the “what.”

In everyday life, motives matter constantly. If your friend suddenly stops talking to you, you might wonder about their motive. Are they angry about something you said, or are they just dealing with problems at home? Understanding someone's motive helps you make sense of their behavior.

A motive is what moves someone to act, the inner push that gets them going. A student's motive for studying hard might be genuine curiosity, wanting good grades, or hoping to impress their parents. Different motives can lead to the same action.

People can have mixed motives too. You might volunteer at an animal shelter both because you love dogs and because it looks good on applications. Neither motive is wrong, though we often admire pure motives, when someone acts from good intentions without expecting anything in return. When we question someone's motives, we're asking whether their real reasons match what they're claiming.