Set apart for the Lord

Numbers 3:1-13
This is the account of the family of Aaron and Moses at the time the Lord talked with Moses on Mount Sinai.
Only Eleazar and Ithamar served as priests during the lifetime of their father Aaron.
God has taken the Levies from among the Israelites in place of the first male offspring of every Israelite woman.
The Levites are mine, for all the first born are mind. When I struck down all the firstborn in Egypt, I set apart for myself every first born in Israel. They are to be mine. I am the Lord.
Why?
Aaron another two sons were dead when they made an offering with unauthorized fire before the Lord.
God's claim on the firstborn goes back to the night of the Passover. Now the Levites replace the firstborn of all Israel on special assignment to assist the priests in the service of God.
The family of Aaron and Moses are higher than any other Israelite, but they have to careful to serve the Lord. Aaron's two sons' dead gives a warning that the Lord is Holy.
How?
To be a minister of the Lord in a church is a high position, it has the honor to pray and to serve the Lord for his people. This is a Holy position and missions. May the Lord pleased with all my praying and serving.
What I have set apart for the Lord? Do the right thing instead of the things done as people in this world. My plan, my mind and my heart are focus on the Lord.