In Buddhism, Samsara is the cycle of suffering. You might get some pleasure and some pain. And you might build up some karma. And then in the next life you get some more. More pleasure this time. Maybe you give back to society and experience the highest of human happiness. Then you get reborn as a god. And you get 10000 years of heavenly bliss. Endless pleasure, orgies with angels of unimaginable beauty, drink the nectar of eternity, have raging wildfires of orgasms that make human orgasms look like flashes in a pan. But perhaps you started a war. You used up all of your karma. You get reborn as a human, but this time you're bitter about not being a god. You stir up shit, you become Hitler and build up a huge karma debt. In the next life you're a hungry ghost. And you're eternally hungry, so hungry and thirsty. You only get tiny morsels of gratification but it's a drop of water in your bottomless bucket of craving, and which instantly evaporates. Perpetually starving to death, unable to alleviate that hunger and yet unable to die, for another thousand years. But then you're a human again, and you get good karma. Then you might be a god again, back to unimaginable pleasure. Then human, then hungry ghost or hell, and then a god, and then back to hell. Pleasure, pain, craving, happiness, joy, unhappiness, despair. You get what you want. Then you don't. The cycle goes on and on.

Then at some point you realize: IT'S ALL THE SAME SHIT. There's nothing to 'GET' out of it. You're just a hamster on a wheel. It's THEN that you are released from Samsara. And that doesn't mean going to heaven again, which you've already done a thousand times. No, it means you're done with this shit. That's Nirvana.

The pickup realm is a microcosm of this. You get pleasure, pain, breakups, people like you, people don't, youre out of your head, you're cool, you're sharing, or you're taking. You're awesome and charismatic as fuck, no you're creepy, you're cheesy, oblivious, a dancing monkey, you're overcompensating and insecure and one of those "pickup guys". Or you're just expansive and a ball of energy and you're loving and just want to LIGHT UP the venue and achieve world peace. You're growing and gaining skills! No, you're just weirding everyone out and upsetting them. You get validated! She's hot! You get what you want! No, you don't and you're just a value leech. You're a boss, no you're a loser, you get flaked on, you get laid, she likes you, no she fucking hates you.

If you actually go hard at pickup, then you're hitting yourself with so much of this, rapid fire, day after day after fucking day, that your brain overloads and comes to the same conclusion: IT'S ALL BULLSHIT. That's the meaning of "burning away the impurities". What's left is your centre - you recognize the bullshit for what it is and your mental energy is free to focus on what you actually want.