An old hymn that I used to sing growing up in the "Old Baptist" churches. I still think of it often, and find these words very suitable for prayer. If you are a sinner, read, be humbled, and take comfort. These are the kinds of words that God likes to hear. (Read Luke 18).
Show pity, Lord, O Lord, forgive,
Let a repenting rebel live:
Are not Thy mercies large and free?
May not a sinner trust in Thee?
My crimes are great, but don't surpass
The power and glory of Thy grace:
Great God, Thy nature hath no bound,
So let Thy pardoning love be found.
O wash my soul from every sin,
And make my guilty conscience clean;
Here on my heart the burden lies,
And past offenses pain my eyes.
My lips with shame my sins confess
Against Thy law, against Thy grace:
Lord, should Thy judgment grow severe,
I am condemned, but Thou art clear.
Should sudden vengeance seize my breath,
I must pronounce Thee just in death;
And if my soul were sent to hell,
Thy righteous law approves it well.
Yet save a trembling sinner, Lord,
Whose hope, still hovering round Thy Word,
Would light on some sweet promise there,
Some sure support against despair.
--Isaac Watts, 1674-1748