and to be a beginner for every piece - that is an attitude of many composers considering themselves as avant-garde. That is of course commendable since this approach avoids to write similar pieces all over again. It must be also very exhausting to begin every time a piece from zero. (of course this is only the half of the truth: to change every time the parameters is not a complete new beginning. There are much more fixed habits in our way of working as we are aware)
There is one decisive disadvantage of this behavior: you will never reach a masterful level in your works since you tried it only once. After a while you may see what you could have done better but this knowledge is unfortunately useless since you are already using another system with completely other problems. I believe that every masterwork in music history stood at the end of a long row of pieces using similar techniques - developing, refining and perfecting these techniques. A composer has to practice as well - like a player - to be really good. How many pieces Bach has written before he could write something amazing like the Chaconne from the violin suites? Let's practice more.
