Mistakes, when you knew better.

I was playing yesterday the $30 Rebuys in Paradise, after a not so good first hour, I was in about $210. After that I manage to cruise my way to the money; there were 721 entrants and 70 spots were paid. Once in the money, I feel like I have a good chance to make the final table. The blinds were huge, but I usually know exactly what to do in this situation. With 22 people left I had a better than average stack with 172k in the big blind and QTh, everybody folded and the small blind with a 250k stack raised to 66k, the blinds were 6k-12k with 600 ante. My first instint was to raise, second was to call, but I didn't think in a fold. I have about 160k, if call that means about 1/3 of my stack, so I decided I was better off raising all in, I thought he could fold or even if called I have a good holding. He decided to call my raise with A3h, the board was AT667 and I was out in 22nd. After the hand with a little more time to analyze it. I realized the big mistake I made. Lets forget the fact he had A3h and he won the hand. He raises to 66k and I reraised to 172k. So he had to call 106k into a more than 240k, and he made such a large raise, 66k into a 12k blind, what was I thinking? Obviously he's calling. The right thing to do in this spot was to fold, as simple as that. Even as nice as QTh looks and the fact that you don't want to be pushed off your blind, the right play was to fold, and the thing that bothers me the most is that I knew better. Sometimes we made a mistake because we just don't know how to play better in a given situation; but in this case I knew. This game is just too complex and with just too many tough decisions to allow ourselves to make clear mistakes in the easy ones. The less we can do is to play "perfect" poker, and by this I mean to play perfect as our limited knowledge can; we owe it to ourselves. How can you improve as a player if you keep coming back to problems already solved?. I don't need that. I want to improve. I know better. I can play "perfect" poker every day, every tournament, every hand.