Where sacrifices should be offered

Lev. 17:1 And the Lord spoke to Moses, saying,
Lev. 17:2 “Speak to Aaron and his sons and to all the people of Israel and say to them, This is the thing that the Lord has commanded.
Lev. 17:3 If any one of the house of Israel kills an ox or a lamb or a goat in the camp, or kills it outside the camp,
Lev. 17:4 and does not bring it to the entrance of the tent of meeting to offer it as a gift to the Lord in front of the tabernacle of the Lord, bloodguilt shall be imputed to that man. He has shed blood, and that man shall be cut off from among his people.
Lev. 17:5 This is to the end that the people of Israel may bring their sacrifices that they sacrifice in the open field, that they may bring them to the Lord, to the priest at the entrance of the tent of meeting, and sacrifice them as sacrifices of peace offerings to the Lord.
Lev. 17:6 And the priest shall throw the blood on the altar of the Lord at the entrance of the tent of meeting and burn the fat for a pleasing aroma to the Lord.
Lev. 17:7 So they shall no more sacrifice their sacrifices to goat demons, after whom they whore. This shall be a statute forever for them throughout their generations.

Verse 7 takes things in an interesting direction. Up to this point, it seems we have a straightforward application of the 2nd Commandment, a regulation for worship which requires Israelites to offer their sacrifices only in the manner the Lord has regulated rather than worshiping him in whatever manner might occur to them on their own. Leviticus 17:7, though, draws a connection between worship in whatever random location one might choose and the worship of false gods, taking us firmly into 1st Commandment territory. This passage suggests that once one has decided to go one's own way, it's not one's own way for very long; instead, one ends up following the well-worn way of wickedness and perdition laid out by the evil one.

The lectionary bring us to John 4 this coming Lord's Day. There, Jesus famously pronounces the end of Temple worship and its replacement with worship in Spirit and truth. In conjunction with Leviticus 17, it would be an error to presume one gets to worship however or wherever one might like so long as one feels spirity. Instead, the "truth" bit in John 4:23-24 calls us to worship according to the Spirit's instruction through the Word, which requires Christians to worship on heavenly Zion, in the fellowship of the saints as they are gathered together in the Church's Lord's Day worship (Hebrews 12:22-24).

Heb. 13:15 Through him then let us continually offer up a sacrifice of praise to God, that is, the fruit of lips that acknowledge his name.