Faith in God who is gracious

Therefore, when the Lord heard, he was full of wrath;
a fire was kindled against Jacob;
his anger rose against Israel,
because they did not believe in God
and did not trust his saving power.
Yet he commanded the skies above
and opened the doors of heaven,
and he rained down on them manna to eat
and gave them the grain of heaven.
- Psalm 78:21-24 (ESV)

Without faith, no one can please God.
God's grace abounds even though He is angry against sins and unbelief.