Often as you read the Old Testament you will wonder why so much detail in things that do not matter any longer but the truth is that they do matter and especially to you as missionaries who are on different fields in the world.  I used these verses to teach cleanliness that wasn’t always practiced and could do so without being paternalistic because it is what the Bible says.  All of the Scriptures were given by inspiration and they all have great value.  I hope you will read them with your eyes open to see what God has put there that can be used to further His kingdom 

Lev 11:32  And upon whatsoever any of them, when they are dead, doth fall, it shall be unclean; whether it be any vessel of wood, or raiment, or skin, or sack, whatsoever vessel it be, wherein any work is done, it must be put into water, and it shall be unclean until the even; so it shall be cleansed.

These verses form a part of Old Testament health laws that are still applicable today all over the world but especially in third world countries. I think it behooves the missionary to take these verses and teach them so that the way we handle food that is so different because of our health laws will not seem so arrogant because we show them that we got it from the Word of God.

If a dead body fell on a wooden vessel, or any vessel, clothing, skin or a sack it was to be put into water and made to set there for several hours until the evening before it would be clean.

Leviticus 10:1 And Nadab and Abihu, the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the LORD, which he commanded them not.

Strange fire is a fire that the Lord has not commanded us to offer. He wants to be worshipped and served as He has commanded. We do not decide what is right or good, He does. How many of our churches are offering strange fire to our God. If He has commanded us to take the gospel to the whole world and our obedience to his commands is for His glory and our worship towards Him what does that say about the way we do things.