Book Quote: The Origin of Our Actions

I haven't read the book, but I like this quote from The Knowledge of the Holy by A.W. Tozer (page 1):

What comes into our minds when we think about God is the most important thing about us....Worship is pure or base as the worshiper entertains high or low thoughts of God. For this reason the gravest question before the Church is always God Himself, and the most portentous fact about any man is not what he at a given time may say or do, but what he in his deep heart conceives God to be like.