With empricism, electricity, ideas, gravitational force, all of that is labeled "material". There might not be matter in a photon, but they are material.
And doesn't matter=energy anyway? E=mc^2
And doesn't matter=energy anyway? E=mc^2
The Lord bless you and keep you; the Lord make his face to shine upon you and be gracious to you; the Lord lift up his countenance upon you and give you peace.