Dallas Willard passed away on May 8th, 2013. Truly a sad day for many in the Christian world. Dallas was in the midst of writing a book on apolgetics (defense of the faith) as he was passing. The book was completed posthumously and reveals many of his intellectual claims for the Christian faith. You can buy this book on Amazon. I highly recommend.
Here is a section of the where Dallas shares about the manner in which apologetics should be conducted:
Since apologetics is involved with ideas, intellectual claims, and reasoning, it is fitting for apologists to engage in intellectual debates and arguments. However, as we will see in this book, given we are seeking to do apologetics in the manner of Jesus, what is not fitting is for apologists to engage in debates and arguments with an antagonizing, arrogant spirit. Indeed, the best way to make the intellectual aspects of apologetics more effective is to combine them with a gentle spirit and kind presentation.