Plantinga, Christians and their doubts

A redated post.

Since the issue of Christian doubts has come up on a couple of blogs, I thought this, from Plantinga, would be of interest.

And what can I say about my spiritual life since leaving Calvin? For me,
as, I suppose, for most others, spiritual life is an up and down proposition,
with what one hopes are the consolidation of small but genuine gains.
Sometimes I wake in the wee hours of the morning and find myself wondering:
can all this really be true? Can this whole wonderful Christian story really be
more than a wonderful fairy tale? At other times I find myself as
convinced of its main lineaments as that I live in South Bend.

Some very similar quotes

Has anyone noticed the similarity between these two quotes from C. S. Lewis and Alvin Plantinga?

Lewis: "Now that I am a Christian I do have moods in which the
whole thing looks improbable: but when I was an atheist I
had moods in which Christianity looked terribly probable."
Mere Christianity

Plantinga: For me, as, I suppose, for most others, spiritual life is
an up and down proposition, with what one hopes are the
consolidation of small but genuine gains. Sometimes I wake
in the wee hours of the morning and find myself wondering:
can all this really be true? Can this whole wonderful
Christian story really be more than a wonderful fairy
tale? At other times I find myself as convinced of its
main lineaments as that I live in South Bend.--
Spiritual Autobiography