Cry for help

Psalm  54: 1-7
Save me, O God, by your name; vindicate me by your might.
Surely God is my help; the Lord is the one who sustains me.
Let evil recoil(後退)on those who slander me;in your faithfulness destroy them.
I will sacrifice a freewill offering to you; I will praise your name, Lord, for it is good.
Why?
Psalmist prayed to the Lord for God is my help, in God's might.
Psalmist has confident to the Lord, and fully trust in the Lord.
The plea is followed by his trust.
The promise of the thanks-offering shows Psalmist's
confidence that God will answer his prayer.
How?
Trust in the Lord, come to the Lord and pray with confidence.