Adam Clarke on 2 Corinthians 3:16

When it shall turn to the Lord - When the Israelitish nation shall turn to the Lord Jesus, the veil shall be taken away; the true light shall shine; and they shall see all things clearly.

There is an evident allusion here to the case of Moses, mentioned Exo 34:34. When he came from the Lord, and spoke to the Israelites, he put the veil over his face; but when he returned to speak with the Lord, then he took off the veil. So, when the Israelitish nation shall return to speak with and pray to the Lord Jesus, the veil of darkness and ignorance shall be taken away from their hearts; but never before that time. The words seem to imply:

1. That there will be a conversion of the Jews to Christianity; and,

2. That this conversion will be en masse; that a time will come when the whole nation of the Jews, in every place, shall turn to Christ; and then the Gentiles and Jews make one fold, under one Shepherd and Bishop of all souls.