Correct me if i'm wrong, but i believe Dalet, Mem, and Tav are letters in the Hebrew alphabet. 4, 40, and 400 respectively. I won't try to go into the meaning behind it, as i'm sure Melatron can do far better. I'd be interested to hear it explained though. I think i have a vague idea, but i could be way off.
And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove that what is good, and acceptable, and perfect, will of God. Romans 12:2