Too bad Obama won’t heed these wise words from someone who evidently understands foreign policy much more than he does. Here is the context of the quote from Lieberman’s WSJ op-ed:

There are of course times when it makes sense to engage in tough diplomacy with hostile governments. Yet what Mr. Obama has proposed is not selective engagement, but a blanket policy of meeting personally as president, without preconditions, in his first year in office, with the leaders of the most vicious, anti-American regimes on the planet.
Mr. Obama has said that in proposing this, he is following in the footsteps of Reagan and JFK. But Kennedy never met with Castro, and Reagan never met with Khomeini. And can anyone imagine Presidents Kennedy or Reagan sitting down unconditionally with Ahmadinejad or Chavez? I certainly cannot.
If a president ever embraced our worst enemies in this way, he would strengthen them and undermine our most steadfast allies.
A great Democratic secretary of state, Dean Acheson, once warned “no people in history have ever survived, who thought they could protect their freedom by making themselves inoffensive to their enemies.” This is a lesson that today’s Democratic Party leaders need to relearn.