Statesboro, GA, USA
So where is she now?"
Let's say there is
a life long atheist and God
like to the deeply doubting
Mother Theresa after death
reveals himself as a fact.
Does that atheist's then
acknowledgement get him in?
I'm not sure that I can answer everything you're trying to ask. But I would like to suggest that there are different kinds of doubting ... or rather, different hearts behind the doubting.
In speaking of Jesus' disciple Thomas, who is most famous for his 'doubting', A.B. Bruce wrote:
"concerning the doubt of this disciple. It did not proceed from unwillingness to believe. It was the doubt of a sad man, whose sadness was due to this, that the event whereof he doubted was one of which he would most gladly be assured. Nothing could give Thomas greater delight than to be certified that his Master was indeed risen. This is evident from the joy he manifested when he was at length satisfied. 'My Lord and my God!' that is not the exclamation of one who is forced reluctantly to admit a fact he would rather deny. It is common for men who never had any doubts themselves to trace all doubt to bad motives, and denounce it indiscriminately as a crime. Now, unquestionably, too many doubt from bad motives, because they do not wish and cannot afford to believe. Many deny the resurrection of the dead, because it would be to them a resurrection to shame and everlasting contempt. But this is by no means true of all. Some doubt who desire to believe; nay, their doubt is due to their excessive anxiety to believe. They are so eager to know the very truth, and feel so keenly the immense importance of the interests at stake, that they cannot take things for granted, and for a time their hand so trembles that they cannot seize firm hold of the great objects of faith--a living God; an incarnate, crucified, risen Saviour; a glorious eternal future. Theirs is the doubt peculiar to earnest, thoughtful, pure-hearted men, wide as the poles asunder from the doubt of the frivolous, the worldly, the vicious: a holy, noble doubt, not a base and unholy; if not to be praised as positively meritorious, still less to be harshly condemned and excluded from the pale of Christian sympathy -a doubt which at worst is but an infirmity, and which ever ends in strong, unwavering faith."
also, in explaining Jesus' words "Blessed are those who have not seen, and yet believe", Bruce wrote:
"little does He mean to say that all the felicity falls to the lot of those who have never, like Thomas, doubted. The fact is not so. Those who believe with facility do certainly enjoy a blessedness all their own. They escape the torment of uncertainty, and the current of their spiritual life flows on very smoothly. But the men who have doubted, and now at length believe, have also their peculiar joys, with which no stranger can intermeddle. Theirs is the joy experienced when that which was dead is alive again, and that which was lost is found. Theirs is the rapture of Thomas when he exclaimed, with reference to a Saviour thought to be gone for ever, 'My Lord and my God.' Theirs is the bliss of the man who, having dived into a deep sea, brings up a pearl of very great price." (A.B. Bruce, The Training of the Twelve)
"How long, O LORD ?
Will you forget me forever?
How long will you hide your face from me?" (Psalm 13:1)
St. John of the Cross, also wrote of the "Dark Night of the Soul", where a believer goes through and intense period of lonliness and abandonment and doubt. When it comes to Sister Teresa, I will agree that the length of this 'dark night' is perplexing. But personally, I see no reason why such a thing should color or define her whole Spiritual tenor. She obviously said many other things which were contrary to the spirit of darkness and doubt, and faith-affirming. Even in her darkness, she professed "such deep longing for God", which I find antithetical to true unbelief. As Karen pointed out, the greatest believer of all (Jesus) went through such moments. To put it simply, I doubt her doubts, perhaps as much as you may doubt her faith.
Lastly, I don't see that such bereavement, longing, and lonliness for something that doesn't exist (among countless people) makes much sense. On the other hand, it makes sense that such pining feelings flow from a once held knowledge of God's presence. To try and explain such a phenomenon in mere Freudian or Evolutionary terms, gives rise to a doubt more profound even than Mother Teresa's.
To answer your question about the atheist ... I'm not sure. But I do think that even an atheist may hope that his doubts are the kind that will ulimately prove to be what I described above. Such a hope would at least begin to suggest a kind of impregnation of faith. Faith does not exclude intellectual questions, but since the question involves the whole person (heart motives as well as the mind), mere intellectual difficulties are not necessarily fatal to it ... anymore than intellectual difficulties are fatal to unbelief.