Here’s why the sound of flowing water, such as the crashing of ocean waves or the pitter-patter of raindrops, may lull a person to sleep…” Click Why Does the Sound of Water Help You Sleep? for the rest of the article.
Put on the whole armour of God, that ye may be able to stand against the wiles of the devil. For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
Spiritual Wrestlings 