I encourage you to read the original interview in it's entirety (it's very short), don't take my word for it.
(all emphasis is attributable to me)
Brzezinski: According to the official version of history, CIA aid to the Mujahadeen began during 1980, that is to say, after the Soviet army invaded Afghanistan, 24 Dec 1979. But the reality, secretly guarded until now, is completely otherwise: Indeed, it was July 3, 1979 that President Carter signed the first directive for secret aid to the opponents of the pro-Soviet regime in Kabul. And that very day, I wrote a note to the president in which I explained to him that in my opinion this aid was going to induce a Soviet military intervention.
Q: Despite this risk, you were an advocate of this covert action. But perhaps you yourself desired this Soviet entry into war and looked to provoke it?
Brzezinski: It isn’t quite that. We didn’t push the Russians to intervene, but we knowingly increased the probability that they would.
Q: When the Soviets justified their intervention by asserting that they intended to fight against a secret involvement of the United States in Afghanistan, people didn’t believe them. However, there was a basis of truth. You don’t regret anything today?
Brzezinski: Regret what? That secret operation was an excellent idea. It had the effect of drawing the Russians into the Afghan trap and you want me to regret it? The day that the Soviets officially crossed the border, I wrote to President Carter: We now have the opportunity of giving to the USSR its Vietnam war. Indeed, for almost 10 years, Moscow had to carry on a war unsupportable by the government, a conflict that brought about the demoralization and finally the breakup of the Soviet empire.