Levitcus 1:1 says And the LORD called unto Moses, and spake unto him out of the tabernacle of the congregation, saying, God called to Moses and spoke to him out of the tabernacle of the congregation.  For us to know what God has to say, He must speak to us, and He will often do it when are assembled together in His name.  Of course, we must first recognize His voice in order to hear Him.  Verse two states,  Speak unto the children of Israel, and say unto them, If any man of you bring an offering,  God did not say when, but if.  I believe this is because an offering is not a debt, but a free gift.  God does not demand that we give Him anything, even our life, but if we do, God can determine how He will use the gift or our life.  Verse three says, If his offering be a burnt sacrifice of the herd, let him offer a male without blemish: he shall offer it of his own voluntary will at the door of the tabernacle of the congregation before the altar.  God said if the offering was to be a burnt sacrifice, that it should be a male without blemish.  We might want to offer something less than perfect if it was going to be burned up anyway, but God expects us to offer the best that we have, and we are to do so willingly.  Verse four states, LORD. And he shall put his hand upon the head of the burnt offering; and it shall be accepted for him to make atonement for him.  We do not live under the sacrificial system, so it may be difficult to truly understand it, but I believe that putting the hands on the head of the sacrifice would represent transferring one's sins to the sacrifice.  We are not under the old sacrificial system because Christ died as a sacrice for all sins for all time, and putting our faith in Him transfers our sins to Him without any physical act.  Verse five says,  And he shall kill the bullock before the LORD: and the priests, Aaron’s sons, shall bring the blood, and sprinkle the blood round about upon the altar that is by the door of the tabernacle of the congregation.  The sacrifice was to be killed before God and the priests, the sons of Aaron, and the blood sprinkled on the altar.  When we accept Jesus Christ as our Savior and Lord, it is done before God and His people and all the world.  The blood of Christ has already been shed for us.  Verse six states, And he shall flay the burnt offering, and cut it into his pieces.  Then verse seven adds,  And the sons of Aaron the priest shall put fire upon the altar, and lay the wood in order upon the fire:  Verse eight continues,  And the priests, Aaron’s sons, shall lay the parts, the head, and the fat, in order upon the wood that is on the fire which is upon the altar:  The sacrifice was to be cut in to pieces, and the priests were to place the majority of it on the wood of the sacrifice to be burned.  Verse nine concludes, But his inwards and his legs shall he wash in water: and the priest shall burn all on the altar, to be a burnt sacrifice, an offering made by fire, of a sweet savour unto the LORD.  Parts were to be washed and burned on the altar itself.  This was to be a burnt offering to the LORD, and would be a sweet savor, or scent, to God.  When we accept Christ as our Savior and Lord, our sins are burned away and we are washed by His blood to be a living sacrifice to God, which will be a sweet savor or scent to Him.