The following excerpt is by Tim Challies (original content from challies.com)
"In these last days, today, he has spoken to us by his Son. He has spoken and is speaking through Jesus. This is not meant to be past tense but present. And how has God spoken to us through Jesus? He has revealed himself, his own character and glory, in the person and work of Jesus Christ. Through Jesus God has spoken to us about his plan of salvation—of the way he has chosen to redeem sinners to himself.
The man who wrote Hebrews is very careful to distinguish between these two types of revelation, between how God used to speak and how God speaks today. If you have studied the letter to the Hebrews, you know that it is a long discourse that continually shows how Jesus Christ is superior to anything in the. That means, of course, that the revelation in Jesus Christ, is better than anything that came before. God used to speak in these ways, but today, even better, he speaks through his Son.
This raises the question of how Jesus speaks to us. I haven’t ever heard the voice of Jesus coming from the skies and I haven’t ever met him face-to-face so he could tell me what to do. How does God speak by Jesus?"
You can read the entire article here.