I had seen a few times a reference to a sermonizing quote by William Henry Griffith Thomas (reproduced in slightly different ways).
“Think yourself empty, read yourself full, write yourself clear, pray yourself keen—then enter the pulpit and let yourself go!”
I did some research on the quote and here is some of what I found.
“Two generations ago, W. H. Griffith Thomas offered young preacher the following formula:
“Think yourself empty, read yourself full, write yourself clear, pray yourself keen; then into the pulpit and let yourself go!”
James Innell Packer, Truth & Power: the Place of Scripture in the Christian Life, Wheaton, IL: Harold Shaw Publishers, 1996, p. 174
“It was my privilege in crossing the ocean in the summer of 1903, to become acquainted with Rev. W. H. Griffith Thomas, an Episcopalian clergyman of London, England, who was the author of a number of books on Bible Study and has spoken at Northfield and elsewhere in our county. Before separating from him on landing he gave me these lines, which bear upon the subject of this chapter—
“Think yourself empty.
“Read yourself full.
“Write yourself clear.
“Pray yourself hot.”
Marion Lawrence, How to Conduct a Sunday School (7th Edition), New York, NY: Fleming H. Revell Company, 1005, p. 91
Ultimately, I found the original source in The Work of the Ministry, William Henry Griffith Thomas, London: Hodder & Stoughton, 1910, pp. 210-212.
(a) We must ‘think ourselves empty.’ By this is meant that we must take our text and proceed to ponder its meaning. Our thoughts should be jotted down as they come, on a sheet of paper, without any attempt at arrangement, but only with an endeavour to elicit for ourselves every aspect of the meaning and message of the text. This effort to think for ourselves will prove of the greatest possible value, and whether it takes a long or short time to ‘think ourselves empty,’ we ought not to approach any outside help to sermon preparation until we are conscious that to the best of our ability we have exhausted for the time our own mental possibilities.
“(b) Then we must ‘read ourselves full.’ After thinking out for ourselves the bearings of the text, the mind is in the proper state to approach the views of others who may have commented, or otherwise written on the passage…”
“(c) The we must ‘write ourselves clear.’ After thinking and reading it is essential to put our thoughts into proper order…These are the three great principles which are usually emphasized in all books on sermon preparation, and it will be seen that they refer exclusively to the purely intellectual aspects of the sermon. For this reason we venture to add a fourth principle to the foregoing.”
“(d) We must ‘pray ourselves keen.’ When the intellectual work has been done, or rather, all through the process of intellectual acquisition, our work should be steeped in prayer, and then when the preparation is over we must commit ourselves and our work to God in order that our delivery, when the time comes, may be ‘in demonstration of the Spirit and of power.’”
Note: “Let yourself go” is from a quote of W. T. Snead on page 244. It does not appear to be part of the original points of Griffith Thomas, unless this was written differently in another place.