I have a friend who is convinced we are wrong to pray in modern formal language.
Personally, I have absolutely no problem with people using "thee" and "thou" and
such language in prayer. None whatsoever. If it helps them feel more
respectful and worshipful, I support it completely. I tend to use that
type of wording simply because it is the prayer language of my
upbringing, and I am totally fluent in it. It's easy, familiar and
automatic to me.
Having said that, I also use "you" fairly
often, especially in my personal, less formal prayers. I tend to use
whatever fits my mood and the situation best.
The one thing I
dislike intensely about the current model is that it tends to make us
notice when the words are used "incorrectly" (as we perceive incorrectly to be), and that tends to lead to
some degree of smugness, condescension, pity or some other sentiment
that is not good and absolutely not necessary. I understand the basic
Primary guidelines to address the Father, thank God, ask for what we
need and close in Jesus' name, but when we start worrying about whether
or not the specific words others use are "correct", we have crossed a
line that shouldn't be anywhere in our sight.