In the Middle Ages, they used to say that the highest point of knowledge is to know that we do not know.
Yet there is a tremendous difference between the "I don't know" of the ignorant and the "I don't know" of the learned person.
The difference is as great as that between the naiveté of a child and that of a person who knows a great deal, yet remains innocent.
We, as human beings, are at the point of sometimes being able to ask questions, or begin a prayer.
We believe – as the Ba'al Shem Tov said – that the words of God in Mount Sinai are eternal. in the sense that He is still speaking them.
God is still speaking; it is we who no longer hear.
But if, in prayer, we will try long enough to listen, too, we may perhaps get to hear something.
–Rabbi Adin Steinsaltz
From a lecture at the Woodrow Wilson Institute, 1990 by Rabbi Adin Steinsaltz