J. I. Packer said:

Knowing God is crucially important for the living of our lives...We are cruel to ourselves if we try to live in this world without knowing about the God whose world it is and who runs it. The world becomes a strange, mad, painful place, and life in it a disappointing and unpleasant business, for those who do not know about God. disregard the study of God, and you sentenced yourself to stumble and blunder through life blindfolded, as it were, with no sense of direction and no understanding of what surrounds you. This way you can waste your life and loseyour soul.

This quotation is from Knowing God (p.14). Found at Theocentric Preaching.[HT: Milton Stanley]