When I was but a wee lad, my grandfather taught me an essential life lesson... that's wrong; while I was but a wee lad, one of the essential life lessons that my grandfather taught me was how to flatten a rolled sheet of paper. Just laying it flat, of course, doesn't do the trick. He taught me that to flatten something that has been rolled, you need to roll it the other way. That essential "trick" works on a much broader venue than just sheets of paper, of course. The most explicit example in the Jewish year is the עשרת ימי תשובה, the ten days from Rosh HaShanah through Yom Kippur, inclusive. The Shulchan Aruch says that one should take extra stringencies on oneself during that time as part of the whole repentance package. We are extra scrupulous for 10 days a year -- doing things that are beyond our normal capability to sustain -- in order to straighten out our twisted souls. Pesach, of course, is also known for its stringencies regarding...
This is a paraphrase of the pasuk in t'hillim 84:7 -- "mei'chayil el chayil" -- which means "from strength to strength". In this case, it is my thoughts and ideas to those who are strong enough to be interested :)