Who would have ever thought??
We've been had by these people.
That would be provide for our common defense. Although I suppose it could also be somewhat related to establishing justice or securing the blessings of liberty.
The key is to not let the liberals at NR win by letting them pretend the pre-amble defines an actionable part of the constitution. Trying to define the terms just gives them the victory. The preamble was just that — the justification for the things they did in the constitution.
Here are our goals; here is what we are going to allow the federal government to do in order to acheive those goals. The constitution does not provide the federal government enough power to perfectly achieve the goals; it has just enough power to make the goals acheivable by the people.