Experience without doctrine

"Experience without doctrine is an unstable, often mystical, and wholly inadequate tool by which to define a movement. "To repent of sins," "to trust in Jesus for salvation," "to be born again" - the expressions used by evangelicals to describe conversion imply doctrinal content. But if there is no consensus about what constitutes sin or a sinful nature, about who Jesus was and is, about what Jesus did and does, and about what terms like "born again" mean, then the problem of a lack of doctrinal coherence stubbornly remains. Experience without content - or experience about which there is no agreement on the meaning of the words used to describe it - remains incapable of providing any clear identity for evangelicalism."

The Real Scandal of the Evangelical Mind, Carl Trueman, Moody Publishers, 2011, pp. 18-19.

[Updated 10:34 for missing word in quote.
Corrected book title, too.  Sorry, Dr. Trueman.]