Authors:

'Tis hard preaching a stone into tears, or making a rock to tremble.

Richard Baxter (1707). “The Practical Works of the Late Reverend and Pious Mr. Richard Baxter: In Four Volumes ; with a Preface, Giving Some Account of the Author and of this Edition of His Practical Works”, p.731
'Tis hard preaching a stone into tears, or making a rock to tremble.