Have you hardened your heart to the voice of God?

Many of us know the voice of the Lord, our Shepherd; many of us have seen His works; but, still, we go astray in our hearts, we act as though we do not know Him, and this grieves the spirit of our God. But, know this, God did not only promised, He swore, that, if we continually go astray in our hearts, and do not follow his ways, that we will not enter into His rest.