Questioning God's Faithfulness

Psalms 77:5-9

I have considered the days of old, the years of ancient times.

I call to remembrance my song in the night: I commune with mine own heart: and my spirit made diligent search.

Will the Lord cast off for ever? and will he be favourable no more?

Is his mercy clean gone for ever? doth his promise fail for evermore?

Hath God forgotten to be gracious? hath he in anger shut up his tender mercies? Selah.