Sing praises to the Lord. For his anger is but for a moment, and his favor is for a lifetime

Psalm 30:1-12
Sing praises to the Lord, O you his saints, and give thanks to to his holy name. For his anger is but for a moment, and his favor is for a lifetime.
By your favor , you made my mountain stand strong; you hid your face I was dismayed.
Turned for me my mourning into dancing; Loosed my sackcloth and clothed me with gladness.
Weeping may stay for the night,  but rejoicing comes in the morning.
他的怒氣不過是轉眼之間；他的恩典乃是一生之久。一宿雖然有哭泣，早晨便必歡呼
The events in 1 Chronicles 21 may possibly provide the background to this psalm. It is written for the dedication of the Temple.
The dark days and tearful nights when life was in danger are past; joy has returned with the daylight. Easy times bred self-reliance. 
But this experience has put life into perspective and shown the psalmist his own helplessness.
Now that the danger is behind him - a humbler and wiser man - he gladly and openly acknowledges his debt of gratitude to God.
Why?
There are trouble and suffering in our life, but it is short for God's mercy and favor is for a lifetime. I shall never moved.
God can turn my mourning into dancing, loosed my sackcloth and clothed me with gladness. God is the Almighty God, sing praise to the Lord.
How?
Sing praises to the Lord! For his Holy name!
Pray to the Lord don't hide face from me or I will dismay!