The medium is the message. This is merely to say that the personal and social consequences of any medium -- that is, of any extension of ourselves -- result from the new scale that is introduced into our affairs by each extension of ourselves, or by any new technology. -- Marshall McLuhanI have for some time considered writing this morning's column, but I have held back. Sir Larry Kudlow's retirement from "The Kudlow Report" and the actions taken by CNBC to deny my appearance on his last show, however, have precipitated the writing of today's opening missive. Having had a close personal and business relationship with Larry and having appeared so many times on "The Kudlow Report" over the years (particularly leading up to and during the crisis in 2006-2009), I offered to appear on Larry's last show, as I wanted to pay tribute to his years of contributions on CNBC. In early March, I paid homage to Larry in an open letter on Real Money Pro. Larry was enthusiastic to have me on but I have been informed that CNBC's upper management has pushed back and does not want me to appear on Larry's final show. Before I explain the apparent reason and tension between CNBC and myself that resulted in the network's refusal of my offer to appear on the final "The Kudlow Report" and why I have not appeared on CNBC since late last summer -- I have been well aware of CNBC's policy towards me for some time -- let me digress and give some perspective to my past relationship with CNBC. Since 2003 I had been a frequent guest host on "Squawk Box," starting in the old days with Mark Haines, David Faber and Joe Kernen. As well, I appeared on over 100 occasions on "The Kudlow Report," "Fast Money," "Squawk on the Street." "Closing Bell," "Mad Money," etc., and I have been a CNBC contributor for the past four years. In the main, I have taken a contrarian view of the capital markets in those appearances. I am not a perma-bear, as witnessed by my call of generational bottom, on "The Kudlow Report" during the first week of March in 2009 and the "buy on dip" mantras on "Fast Money" during the summers of 2010 and 2011. At periods in 2013, however, I was a very vocal bear on CNBC (reminiscent of my appearances on "Squawk Box" and "The Kudlow Report" in 2007-2008).