Then those who feared the Lord spoke to one another, And the Lord listened and heard them; So a book of remembrance was written before Him For those who fear the Lord And who meditate on His name. “They shall be Mine,” says the Lord of hosts, “On the day that I make them My jewels. And I will spare them As a man spares his own son who serves him.”
Malachi 3:16-17 NKJV
Fear in this context has nothing to do with being afraid of God, nothing to do with unpleasant emotions towards God, fear in this context is talking about reverence respect and awe for God.
This Bible text can be interpreted as "those who reverence/respect the Lord spoke to one another and the Lord listened and heard them......"
Those who have deep-respect/high-regards (reverence) will be heard when they pray, the Lord will listen to them and answer them, God will call them His own ("They shall be mine"). He will make them His Jewel (an ornament to be adorned) and He will spare them from every form of destruction and every form of evil.
This is to encourage you and i to love and respect the Lord more. God will bless you as you seek/desire the Lord.