From A Course in Miracles text 13.VI.6 and 11:
Look lovingly on the present
for it holds the only things
that are forever true.
God's guiltless Son is only light. (6)
Light is unlimited, and
spreads across this world in quiet joy. (11)
So beautiful. I memorized this while I worked out this morning and repeated it to myself as I drove to work. I found my mind continuing the saying even as I was distracted with other things. And I actually remembered it now that I am at work.
I can easily remember quiet joy as being present everywhere at all times. I can ask the physicist and find it is true that this world is made of light (photons) as well as smaller particles of energy.