Adam Clarke

In whom - By which foundation corner stone, Christ Jesus, all the building, composed of converted Jews and Gentiles, fitly framed together, συναρμολογουμενη, properly jointed and connected together, groweth unto a holy temple - is continually increasing, as new converts from Judaism or heathenism flock into it. It is not a finished building, but will continue to increase, and be more and more perfect, till the day of judgment.