This Shabbat we begin reading the Book of Vayikra, much of which deals with the laws of the korbanot , the sacrifices which were offered in the Bet Ha'mikdash . For many of us, these laws seem very difficult to relate to, as the Jewish People have been unable to offer sacrifices for nearly two thousand years, since the destruction of the Bet Ha'mikdash . Ironically, however, the Midrash tells us that it is customary for schoolchildren to begin learning Humash specifically from this book, Sefer Vayikra. Although these laws strike us as dry, uninteresting and irrelevant, and we would never imagine making this part of the Humash the first section to teach our children, the Midrash tells us that this is precisely what should be done. The Midrash explains: הואיל וקרבנות טהורים והתינוקות טהורים, יבואו טהורים ויתעסקו בטהורים . Since the sacrifices are pure, and the children are pure, let the pure ones come and deal with that which is pure. Today, the custom is that when children begin learning Humash , they read the first several pesukim of Sefer Vayikra, and then they are taught the story of creation at the beginning of the Humash . But let us delve a bit deeper into this notion, that the children must be taught the concept of sacrifices already at an early age. A researcher named Dr. K. Anders Ericsson once conducted a major study, involving students at the Berlin Academy of Music. This school trains some of the greatest young musicians in the world, many of whom go on to become the most accomplished people in their fields. Dr. Ericsson studied the work habits of these students, since they began learning music. He and his team found that all of them had begun learning when they were very young, and all worked hard throughout their youth. However, there was a vast difference in the number of hours that the students had devoted to practicing. Some had spent a total of 10,000 hours of practice by the time they were twenty, some around 8,000 hours, and some just 4,000 hours. The researchers discovered that this factor – the number of hours of practice – was the main determinator of the students' level of achievement. Those who invested the most effort were the ones who showed the most promise and were on track to become the world's leading musicians. Natural talent was not nearly as significant a factor as hard work and effort. The most important thing we need to teach our children, already at a young age, is the value of korbanot – sacrifice, exertion, hard work, and effort. If our children get the message that success is determined by natural talent, by how smart a person is, by one's good looks, by the wealth of the family he was born into, or by any other factor other than hard work – we are lowering their chances of success. King Shlomo says in the Book of Mishleh (24:30-31): על שדה איש עצל עברתי, ועל כרם אדם חסר לב – "I passed the field of a lazy man, and the vineyard of a person without a heart." He then proceeds to describe how it looked: overgrown, abandoned, and in ruins. The lazy person's field does not produce much, if anything. There are so many people in our society – even adults in their 20s, 30s and 40s – whose lives look like these fields, who fail to produce, because they were never taught about the central importance of korbanot , of making sacrifices – giving our time, our energy, our attention, and our money for the sake of pursuing valuable and ambitious goals. This message needs to be taught to our children when they are still טהורים , when they are very young and still developing their habits. The earlier in life children learn this message, the easier it will be for them when they grow older to make the sacrifices and effort that they need to make in order to succeed and maximize their potential.