What, then, is more divine than the working of the Holy Spirit, since
God Himself teaches that the Holy Spirit presides over His blessings, saying:
"I will put My Spirit upon thy seed and My blessings upon thy children."
For no blessing can be full except through the inspiration of the Holy
Spirit. Wherefore, too, the Apostle found nothing better to wish us than
this, as He himself said: "We cease not to pray and make request for you
that ye may be filled with the knowledge of His will, in all wisdom and
spiritual understanding walking worthily of God." (Col 1:9) He taught,
then, that this was the will of God, that rather by walking in good works
and words and affections, we should be filled with the will of God, Who
puts His Holy Spirit in our hearts.
St. Ambrose of Milan, On the Holy Spirit, Book I