"True Christian consistency does not consist in stereotyping our opinions and views, and in refusing to make any improvement lest we should be guilty of change, but it consists in holding our minds open to receive the rays of truth from every quarter and in changing our views and language and practice as often and as fast as we can obtain further information. I call this Christian consistency, because this course alone accords with a Christian profession. A Christian profession implies the profession of candor and of a disposition to know and obey all truth. It must follow that Christian consistency implies continued investigation and change of views and practice in conformity with increasing knowledge. No Christian, therefore, and no theologian should be afraid to change his views, his language, or his practices in conformity with increasing light."
--Charles G. Finney, 19th Century Revivalist

I would only add that his point speaks a general truth about intellectual candor, or philosophical honesty, and therefore holds true even if one removes the "Christian" from his statement.

Even over the last couple of months, during the time I've been debating on this board, some of my views have changed. Generally, it is not that I reject the conspiratorial view of many events, such as 9/11 and others. I do not. But it is that I recognize the solution has to be a return to Constitutional principles of liberty and therefore all forms of collectivism must be dethroned.