When one hears the word meditation, it conjures an image of Maharishi Yoga
Maybe for you it does, but whatever images you conjure don't necessarily apply to anyone else, much less everybody.
talking about finding a mantra and striving for nirvana.
Two things that are in no way integral to meditation.
The purpose of such meditation is to empty oneself. . . . [Satan] is happy to invade the empty vacuum of your soul and possess it.
Two things, first neither you nor anyone else has ever offered up even halfway compelling evidence for the existence of either satan or souls. Second, just where did you get the idea that meditation entails a persons "soul" leaving the body?
That is why people serve Satan without ever knowing it or deciding to
So much for free will.
but no one can be a child of God without making a decision to surrender to him.
That statement implies that your mythical boogeyman is more powerful than your "god", your "god" has to be let in but satan can posses all willy-nilly with no one being none the wiser.
Beware of systems of spirituality which tell you to empty yourself.
Empty yourself of what, exactly?
You will end up filled with something you probably do not want.
Not even gonna go there.