Adam Clarke on Ephesians 3:12

In whom we have boldness - By whom we, Gentiles, have την παρῥησιαν, this liberty of speech; so that we may say any thing by prayer and supplication, and την προσαγωγην, this introduction, into the Divine presence by faith in Christ. It is only in his name we can pray to God, and it is only by him that we can come to God; none can give us an introduction but Christ Jesus, and it is only for his sake that God will either hear or save us. It is on the ground of such scriptures as these that we conclude all our prayers in the name, and for the sake, of Jesus Christ our Lord.