Koan
Neither words nor silence
Wuzu said, "When you meet a person of the Way on the road, greet them neither with words nor with silence. How will you greet them?"
The Gateless Gate, case 36
How to sit with it
Try greeting the next person you meet with your full attention and see what comes out.
Read it once more, slowly. Then sit for two minutes and let it stay in the background. There is nothing to solve. New to this? Read what a koan is.