Who told you about Mother Teresa's salvation? Who told you that she hoped work would take her to God? The arrogance of presuming to know the state of another's soul is breath-taking. How shallow must one be, to claim to know the mind of a saint? If she was simply a very nice lady, she was a better person than any of the OPC women on the forum. And she loved God so much that she ministered to Christ in every one of the least among men, according to Christ's words. If she doubted, she was no less than St. Thomas; a person who never doubts is not necessarily more faithful.
Mother Teresa said she doubted the existence of God and had doubted the existence of God for decades before her death.
She was a hard-working, unhappy, frightened and confused woman whose faith did not sustain her.