"A minister may fill his pews, his communion roll, the mouths of the public, but what that minister is on his knees in secret before God Almighty, that he is and no more." - John Owen (1616-1683)
Recommended reading:A Quest for Godliness: A Puritan View of the Christian Life, by J. I. Packer
The Puritans Got it Right, by Dr. Joel Beeke
Our Nation Laid in God's Balance, by Dr. Joel Beeke (2013)
"Shall not I visit them for these things? saith the Lord: shall not my soul be avenged on such a nation as this?"