"Flexible" assumes a starting point of setting out to learn things. I happen to have already _been_ learning things for quite awhile, and I might as well claim the advantages of my age along with the disadvantages. I did not become a Christian in the first place without looking into other beliefs, like reincarnation. But now I know my Savior, and it is He, not astrologers, Who has provided the Heavenly home to which my past wives have gone.
I do still discover new things every week of my life; but some things already _have_ been tested and sifted and evaluated.