Ephesians 2:6. “And hath raised us up together, and made us sit together in heavenly places in Christ Jesus:”
(The following was taken from Barne’s Notes on the Bible. He says it clearly, and I couldn’t improve on his work )
And hath raised us up together – Believers are raised from the death of sin to the life of faith because of the resurrection of Jesus. So close is the connection between Him and His people, that His resurrection made theirs certain (Colossians 2:12; Romans 6:5).
And made us sit together – Together with Him. That is, we share His honors, which He has claimed already for us. Our connection with Him is so close that we will partake of His glory in heaven, and in some measure we do now (Matthew 19:28; Romans 8:17).
In heavenly places – Ephesians 1:3. The meaning is that He has gone to the heavenly world as our Head and Representative. His entrance there is a pledge that we will also enter there. In this life, we have the anticipation of glory, and are admitted to exalted honors, as if we sat in heavenly places, in virtue of our connection with Him.
In Christ Jesus – It is in connection with Him that we are exalted, and filled with joy and peace. The meaning of the whole is,” We are united to Christ. We die with Him, and live with Him. We share His sufferings, and we share His joys. We become dead to the world by virtue of His death; we become alive unto God by virtue of His resurrection. On earth we are exalted to honor, peace, and hope, by virtue of His resurrection; in heaven we shall share His glory and partake of His triumphs.”