God has given His people the astonishing privilege of prayer: through Jesus Christ, our great High Priest, we may draw near to the throne of grace with confidence and bring our needs, burdens, and praises directly to the Father. And because Christ has offered the once-for-all sacrifice for sin, we can be sure that even our weak and halting prayers are received by God as a pleasing incense before His throne.
God appoints Aaron and his sons to serve as priests, clothing them in holiness and setting them apart to represent His people before Him. This points us to Jesus Christ, our true and everlasting High Priest—chosen by God, perfectly holy, and deeply compassionate, able to save completely all who draw near to God through Him.
The most important thing about a Christian is not merely that his sins are forgiven or that he will go to heaven when he dies, wonderful as those truths are. The greatest thing is that, by the grace of God, he has become a worshiper of the true God. And that worship is not just something we do with our lips on Sunday morning; God also calls us to present our whole lives as a living sacrifice, offering ourselves to him in thankful devotion.