Letters reveal Mother Teresa's despair

Re: Letters reveal Mother Teresa’s despair

for every deed there is a reward no matter how small or big that is
for every wrong deed there is a punishment no matter how small or big that is

it is not mentioned in quran that good deeds of non muslims will go without reward or are worthless

second one is sinful only if he/she had heard about islam in true sense and rejected , we don’t know she listened about islam from whom

still being non muslim specially from Ahley kitab ( mostly jew or christens ) there are momin 3:110 ( thoes got the knowledge that Allah is one and jesus is not God or sun of God rather only messenger of God )
the words she had writen shows that her heart was going against the basic teaching of christianity , i can’t understand , was she thinking about one God or not , if yes then surely she will be momin otherwise atleast she will get reward for every good deed