2 Corinthians 9:11

bountifulness (symplenesse, Wiclif; syngleness, Tyndale). The Greek word here is the same as in ch. 2 Corinthians 1:12; 2 Corinthians 8:2, where see notes. The word -bountifulness" was first introduced by our translators, who however have liberalityin the margin.

which i.e. the -bountifulness" or -singlemindness" just spoken of.

causeth through us thanksgiving i.e. your singleness of heart, your absence of all secondary and selfish motives, provides us with the means of alleviating the distresses of others, and thus elicits from them thanks to God out of the fulness of a grateful heart.