When crossing a street I was told to be aware of the above-three items.
Stop. I must stop at the red light if I am to get across the street safely. Stopping puts me in a right state of mind to prepare me to take on the next step before crossing the street.
Look. View the surroundings. Assess what's happening. Pay attention to traffic.
Listen. Engage the green light. Accept what's happening and then walk across.
These three points are key to the spiritual life.
Did the disciples on the road to Emmaus miss Jesus?
Were they totally self-engaged?
Did they only wake up, notice and look after Jesus engaged them?