Psalm 112:1, 7 NLT
1 Praise the LORD! How joyful are those who fear the LORD
and delight in obeying his commands.
7 They do not fear bad news;
they confidently trust the LORD to care for them.

I like this succinct explanation of fearing God in Eaton’s commentary on Ecclesiastes:

The way of safety is to fear God. In the wisdom tradition the ‘fear’ of God is the awe and holy caution that arises from realization of the greatness of God: ‘Splendour… terrible… majesty… power… justice… righteousness… Therefore fear him.’ (Job 37:22-24)

–Michael A. Eaton, Ecclesiastes pp. 122-123

Ecclesiastes 8:12-13
But even though a person sins a hundred times and still lives a long time, I know that those who fear God will be better off. 13 The wicked will not prosper, for they do not fear God. Their days will never grow long like the evening shadows.

and earlier he says:

…in the Lord’s Prayer … the twin truths that God is ‘Father’ but ‘in heaven’ guard against craven fear on the one hand and flippancy on the other.

pg.99

Ecclesiastes 5:7
Talk is cheap, like daydreams and other useless activities. Fear God instead.

Fear preserves seriousness, faith preserves cheerfulness. Fear is as lead to the net to keep a Christian from floating in presumption, and faith is as cork to the net to keep him from sinking in despair.

–Thomas Watson, Religion, Our True Interest, 10