Smoke burns like glitz, which should be said: glitz burns like smoke. It means: superficial prosperity is like burning fireworks, which will disperse when the wind blows, which is also unrealistic.
Everything is sudden, which means: everything is a moment. Just, in this case, it means: but so.
Life is short, fame and fortune are fake, and all this is a moment for life.
The general mood is: pessimistic, not positive.