I read this Psalm yesterday morning and was particularly struck by the line in italics. I surely do not know the measure of God's righteousness and salvation, but I will praise him for it nonetheless.
But as for me, I will always have hope;
I will praise you more and more.
My mouth will tell of your righteousness,
of your salvation all day long,
though I know not its measure.
I will come and proclaim your mighty acts, O Sovereign Lord;
I will proclaim your righteousness, yours alone.
Since my youth, O God, you have taught me,
and to this day I declare your marvelous deeds.
Even when I am old and gray,
do not forsake me, O God,
till I declare your power to the next generation,
your might to all who are to come.
Your righteousness reaches to the skies, O God,
you who have done great things.
Who, O God, is like you?
Though you have made me see troubles, many and bitter,
you will restore my life again;
from the depths of the earth
you will again bring me up.
You will increase my honor and comfort me once again.