I was walking along a street recently when I noticed multicoloured markings which had been sprayed on the road. 

They indicate buried services such as electric and water services. I cannot see these services directly, but I can know with certainty that they are there, because of the signs. 

There are many things which I can know with certainty, despite not being able to perceive them directly. I know that things lack the ‘thingyness‘ they seem to possess despite not being able to see this lack directly. Although I cannot see it with my eyes, I can understand it with my wisdom. I can use the signs pointed out by my Spiritual Guide to lead me to an understanding and a conviction of the emptiness of all phenomena. 

May I and all living beings attain a direct realisation of emptiness.