If we lack flexibility, what it really means, is not that we are certain that our path is the truth, for wisdom by its very nature is cool, calm; and has the ability to entertain even notions that oppose – for example – a scientist who is radical in his views is no scientist – as a true scientist must be equally at home exploring ideas that he may reject, but the very lack of ability to think, is the very definition of anger – namely, my ego is so tied into my brain, that I cannot tolerate any thought process that differs from mine.