Of [my] free choice My God and out of love for You--
I desire to remain and do what ever be Your Holy Will in my regard. ...
Even if I suffer more than now--I still want to do Your Holy Will.--
This is the dark night of the birth of the Society.--
My God give me courage now--this moment--to persevere in following your call.

...

Today--my God--what tortures of loneliness.--
I wonder how long will my heart suffer this. ...
My God, give me courage now to fight self and the tempter.
Let me not draw back from the sacrifice I have made of my free choice and conviction.--
Immaculate Heart of my Mother, have pity on thy poor child.
For love of thee I want to live and die an M.C.

...

The more the work is spreading the more clear it becomes [it is] His Will.
Soon it will be one year [since she had left Loreto]--
though there has been plenty of suffering and tears,
there has not been one moment of regret. I am happy to do God's will.

(Blessed Mother Teresa, Come Be My Light, p 134-136)