Today's reading Leviticus 1:1- Leviticus 14:32
...(they) offered strange fire before the Lord. Lev. 10:1 KJB
I see God has an order. A way he likes things done. When Nadab and Abihu offered a different offering he not only thought it strange but then he killed them. That must mean doing it God's way is pretty important.
I have the free will not to do what I would like and we are not bound to offerings and such because of Jesus complete offering at the cross. I need to use my freedom not to satisfy my flesh but to honor and glorify Christ.