On a physiological level, learning new things is good for your brain and bolsters cognitive functioning. Learning new things sparks a process called neurogenesis. This process is important for maintaining a healthy and active brain throughout your lifetime.
According to positive psychologist Mihály Csíkszentmihályi, in our brains, happiness and learning are tied together. Best known for coining the psychological concept of flow in his seminal work Flow: The Psychology Of Optimal Experience, Csíkszentmihályi says of learning new things: