Stephen wrote:If by "Buddha nature" you mean the potential to reach the same awakening, Nibbana, then naturally it need not be pointed out anywhere in the suttas because it is the entire point of the Buddhist teachings to reach this state of enlightenment.
I'd try not to call the Buddha "Lord", as it makes it seem like he's being worshiped or thought of as some kind of deity by anyone who doesn't understand Buddhism fully (which is a lot of people in the West). Perhaps better to say either Buddha, Master, Teacher or Tathagata (as he referred to himself, also meaning Teacher). Anything but "Lord".
"Lord," is just an honorific, like "sir." It does not denote anything supernatural. You're getting your definition from the Christian usage most likely.