I said in my heart, "Come now, I will test you with pleasure; enjoy yourself." But behold, this also was vanity. I said of laughter, "It is mad," and of pleasure, "What use is it?" I searched with my heart how to cheer my body with wine—my heart still guiding me with wisdom—and how to lay hold on folly, till I might see what was good for the children of man to do under heaven during the few days of their life.
Ecclesiastes 2:1-3

There is nothing better for a person than that he should eat and drink and find enjoyment in his toil. This also, I saw, is from the hand of God, for apart from him who can eat or who can have enjoyment? For to the one who pleases him God has given wisdom and knowledge and joy, but to the sinner he has given the business of gathering and collecting, only to give to one who pleases God. This also is vanity and a striving after wind.
Ecclesiastes 2:24-26

Whoever loves pleasure will be a poor man; he who loves wine and oil will not be rich.
Proverbs 21:17

... the LORD takes pleasure in those who fear him, in those who hope in his steadfast love.
Psalm 147:11

You make known to me the path of life;
in your presence there is fullness of joy;
at your right hand are pleasures forevermore.
Psalam 16:11

I'm considering these passages in light of the pursuit of happiness. It is in accordance with God's good pleasure to adopt us as his children through Jesus Christ and to make known to us the mystery of his will (Ephesians 1:5,9). God works in us for his good pleasure (Phillippians 2:13). Jesus promises life "to the full" (John 10:10) and he prays that we would experience the full measure of His joy (John 17:13). We have the fullness of his grace; experiencing one blessing after another (John 1:16).

Life needs to be redefined by these things. Even in light of our troubles. We must recognize that they are momentary and fleeting (2 Corinthians 4:17). I'm not making nothing of your pain, suffering, struggle, sin, or fear. We're merely stuck in a moment; this time is passing. The urgency to understand the grace you are being offered is even more pressing when you consider this.