John Trapp on Psalms 56:4

Verſ. 4. In God I will praiſe his Word] Having placed my confidence in God, I will take his bare word for my ſecurity. He hath promiſed to make mee King, 1 Sam. 16.13. and he will not ſuffer his faithfulneſs to fail, or alter the thing that is gone out of his mouth, Pſal. 89.33. the Word of God cannot bee broken, John 5.35. David once doubted of it, but hee ſoon took himſelf up for halting, Pſal. 116.11.

I will not fear what fleſh can do unto me] Fleſh is terminus diminuens: what can proud fleſh do againſt the God of the ſpirits of all fleſh? Man is but deſpicable fleſh at the beſt.