除了前三種自動的獻祭(燔祭、素祭及平安祭)之外，上帝對另兩種必須做的「義務的獻祭」也有詳細的說明。當罪攔阻了人與上帝的交通，就是獻這樣的祭。贖罪際──可以遮蓋不潔淨的罪，隱而未現的罪或誤犯的罪等等，當罪的嚴重性不斷增強的時候，贖罪祭為罪人提供補救之道。贖愆祭──可以遮蓋冒犯上帝和傷害人的罪──為受傷或得罪的那一方爭取賠償。

        一個倒塌的欄干、一道臉上的疤痕、一張刮傷的唱片有什麼共同點？(提示：它們的壞損和你念國中的兒子無關。)放棄嗎？它們始終都是一些不愉快過去的提醒：你的車撞上了消防栓，刮鬍刀報銷了，心愛的唱片也泡湯了！
        對以色列人來說，還有別的提醒──羊的咩咩叫聲、揮之不去的血腥味、裊裊升起的煙霧，在在都提醒：他們是罪人，每一個新的罪，即使是微不足道的小罪，也得犧牲一隻動物獻祭。
        這樣是不是使你更加感謝耶穌基督為你而死？祂為你死的這個事實，使你從永無止盡的獻祭中得到釋放，而有可以喜樂的最大理由。今天之中，不時提醒自己：基督為你一次獻上就永遠有功效的贖罪祭，讓這件事提醒你，在你的嘴唇和生命中結出讚美果子。

        獻祭
        和前三種奉獻不同，不論是贖罪祭或贖愆祭都不是一種馨香的祭，因為罪在上帝面前絕無馨香可言。這兩種奉獻預表基督在十字架上代死的種種意義：
        ．祭物是絕不可以有瑕疵或有殘疾的。
        ．罪從罪人的身上轉嫁到祭物上。
        ．祭物代替罪人的地位而死。
        ．贖罪祭在營外舉行。

罪的力量是那樣強大，以致基督必須犧牲在十字架上才能彌補。

English

        In addition to the three sweet savor offerings, God gives instruction regarding two nonsweet savor sacrifices—both required when sin had interrupted fellowship with Him. The sin offering—which covered sins of uncleanness, neglect, or thoughtlessness—provided restoration for the sinner while reinforcing the seriousness of sin. The trespass offering—which covered sins of injury to God and others—provided compensation for the injured or offended party.

        What do a dented fender, a facial scar, and a scratched stereo record all have in common? (Hint: It has nothing to do with your teenage son!) Give up? They are all constant reminders of unpleasant experiences: the fire hydrant that ran into your car, the razor that "gotcha," your favorite album that was ruined.
        For die Israelites there was another collection of reminders: the bleating of a lamb, the smell of fresh blood, the sight of rising smoke. All served to remind them that they were sinners. Every new sin, even an unintentional one, demanded that another animal be slain.
        Doesn't that make you appreciate all the more the death of Jesus Christ for you? The fact that He died to set you free from the endless requirement of additional sacrifices is indeed great reason for rejoicing. Remind yourself often today of Christ's once-for-all-time sacrifice for you, and let that reminder bear the fruit of praise on your lips and in your life.

        Sweet and Sour Offerings
        Unlike the other three offerings, neither the sin nor the trespass offering was a sweet fragrance to God, because sin is never sweet to God. Those two offerings foreshadow many details of Christ's sacrificial death on the cross.
        • The victim was without spot or blemish.
        • Sin was transferred from the offerer to the offering.
        • The offering died in the sinner's place.
        • The sin offering took place outside die camp.

Sin is so big that it takes a Christ with a cross to measure it.