Christ is greater, better, superior to Moses! Whoever the author of the book of Hebrews was, he handled this very delicately. He could have caused offense by seemingly putting Moses down, as Moses was held in high regard by the Jews. Yet, he was able to get across the fact that here was One greater than Moses in such a way that he showed that Moses, indeed, was faithful. However, he was faithful as a servant within the house of which Jesus Christ is the Builder.
Notice the word "confidence" in Hebrews 3:6. In Hebrews 4:16, the exact same word is translated as "boldness" These Hebrews were no longer rejoicing, nor were they bold. Their apathy had them just lying there, taking life in. They were observers, not doers, neglecting what had been given to them. Thus, the exhortation to be bold and confident in overcoming and growing, and to rejoice in the greatness of the message that has been given.
We could not have received a greater message than the one that we have been given. It is just not possible to hear any news greater than what God is preparing for His children.
John W. Ritenbaugh
Hebrews: A Message for Today