Kalu
Now I lay me down to sleep? Just got me wondering.
That is the whole point, actually, Kalu: in British English, as opposed to American, you can only use "lay" if it takes an object.
Now I lay me down to sleep - does precisely that and the sentence can be parsed as Subject I, verb lay, direct object me, Adverbial clause of reason or purpose to sleep.
In the Passive voice it is perfectly correct to say, "Queen Elizabeth was laid to rest in the royal vault beside her husband, Prince Phillip.
But incorrect to use lay in the present tense, or will lay in the future tense in an Active sentence.