Adam Clarke's Commentary on the Bible - 2 Corinthians 6:12
Ye are not straitened in us - That is, Ye have not a narrow place in our affections: the metaphor here is taken from the case of a person pent up in a small or narrow place, where there is scarcely room to breathe. Ye are straitened in your own bowels - I have not the same place in your affections which you have in mine. The bowels are used in Scripture to denote the most tender affections. See the note on Matthew 9:36 . read more
Adam Clarke's Commentary on the Bible - 2 Corinthians 6:11
O ye Corinthians, our mouth is open unto you - I speak to you with the utmost freedom and fluency, because of my affection for you. Our heart is enlarged - It is expanded to take you and all your interests in; and to keep you in the most affectionate remembrance. The preceding verses contain a very fine specimen of a very powerful and commanding eloquence. read more