by St. Nicholai Velimirovich
Water is finer than earth; fire is finer than water; air is finer than fire; electricity is finer than air. Nevertheless, even air and electricity are dense elements in comparison to the spiritual world.
Electricity is very fine but the voice is finer than electricity; the thought finer than the voice; the spirit finer than thoughts.
The air is fine and it carries the voice over a great distance. Electricity is fine and it carries light over a great distance. Nevertheless, how much more is every deed, every word and every thought of ours carried to all ends of the spiritual world. O how terrible it is to commit wicked deeds and to speak sinful words and to think evil thoughts! To what immeasurable distances do these things pass on the waves of the spiritual sea! But do not go into the details of the unknown world. The main thing is that you know and that you measure how all of your deeds, words and thoughts unavoidably create an impression on all four sides: On God and the spiritual world, on nature, on men and on your soul. If you train yourself in this knowledge, you will attain a higher level of saving vigilance.