The ‘third key’ shows us where to verify the truths taught by others. Here the Venerable Ajahn counteracts our tendency to be engrossed by external things and orients us in the direction of spiritual truth. He emphasizes that we must look beyond relative and superficial truth to find real truth. The key to doing this is ‘looking within.’ To help us begin this necessary introspection, he shows us the difference between observing external material phenomena and observing internal mental phenomena. Through the latter, the Dhamma may be realized directly and independently...

(Foreword)