This amazes me every time I hear it.
Russian Strategist: “Comrades, NATO has surrounded our homeland with military bases. They are aggressive, needlessly paranoid, using the absurd notion of our aggression as justification. We must not encourage this aggressive expansion. What shall our strategy be?”
Subordinate 1: “Bolster our defenses in kind?”
Subordinate 2: “Seed our economy!”
Subordinate 3: “Create ties with other nations peacefully, to show them a better way than Western aggression, manipulation and coercion.”
Subordinate 4: “Unite with our allies and resist the corrupt west.”
Subordinate 5: Taps chin. “…What if we expend vast resources and hundreds of thousands of young men ‘liberating’ our tiny neighbor, as they aren’t yet in NATO? To, uh…… discourage NATO from expanding?”
The room looks to the young advisor, in dead silence.
Strategist: “Brilliant! Genius! That will certainly discourage the growth of NATO.”

Yeah, the last point is especially interesting. Some reports I've read suggest that Putin is a relative moderate in Russian politics, and there are some figures that would make him look tame without Putin "keeping them in line," so to speak.