Some of my favorite verses in Psalms:

Psalm 51: 10-12

Create in me a pure heart, O God, and renew a steadfast spirit within me.

Do not cast me from Your presence or take Your Holy Spirit from me.

Restore to me the joy of Your salvation and grant me a willing spirit to sustain me.

Psalm 103: 8-12

The Lord is compassionate and gracious, slow to anger, abounding in love.
He will not always accuse, nor will he harbor his anger forever;
He does not treat us as our sins deserve or repay us according to our iniquities.
For as high as the heavens are above the earth,
so great is His love for those who fear Him;
As far as the east is from the west, so far has he removed our transgressions from us.