Nadab and Abihu consecrated themselves to God, then offered strange fire on the altar. As a result, God struck them dead. Similarly, in the New Covenant, Ananias and Sapphira consecrated themselves to God. As the apostle Paul says, they offered themselves as a “living sacrifice” for Jesus Christ (Romans 12:1-2). They received the baptism of the Holy Spirit. Then when they lied, God struck them dead.
Today, many in the church are offering this “strange fire.” Some examples include humanism, pride, and doing God's work on your own. The only reason people aren't dying is because they've never been consecrated. However, to be a true Christian, and to be a true church, you must be consecrated entirely to God. You must not only be born again, but you must be sanctified.
Will you devote yourself to Jesus as a living sacrifice, so that the fire of the Holy Spirit can indwell you?