This week's Torah portion, Parshas Vayikra, discusses the different korbanos (offerings) that the Jews brought in the mishkan (tabernacle) as part of their service to G-d. Besides the daily offering, known as korban tamid, there were 3 optional and 2 obligatory offerings. The optional offerings were brought when one had the desire to show his subservience to G-d. They were: 1) The korban olah (elevation offering),which was completely consumed by fire on the altar; 2) the korban mincha (meal offering), an inexpensive offering of flour, oil, and spices; and 3) the korban shelamim (peace offering), which was partially burnt on the altar, and divided between the kohanim (priests) and the owner of the animal. The obligatory offerings, the korban chatas (sin offering) and the korban asham (guilt offering), were brought to atone for certain sins that were committed unintentionally. There is no korban for transgressions committed intentionally; repentance alone effects atonement for them.