'In The End The Only One You Have Is God' - ISIS Captive Kayla Mueller Wrote to Family Before Death

A letter written by Kayla Mueller – the latest American citizen to have died while being held captive by Islamic State militants – was made public by her family on Tuesday after the White House confirmed her death.

The Islamic militant group claimed Mueller was killed by a Jordanian airstrike, but this has yet to be verified by American or international intelligence, ABC News reported Jordanian forces attacked ISIS positions in Syria after a captive Jordanian pilot was burned to death by the terror group.

Mueller was taken captive on Aug. 4, 2013 after leaving a Spanish Doctors Without Borders hospital in Aleppo, Syria. The jihadists seized her just a few days before her 25th birthday.

Mueller's family received the letter in spring last year while Mueller, an Arizona native, was still in ISIS hands. However, it was not made clear how the family got hold of their daughter's handwritten letter.

In her letter, Mueller said her captors had not harmed her and that she was treated with "utmost respect + kindness." She wrote nothing negative about ISIS in her letter.

She blamed herself for the pain her family has gone through with her capture. "If you could say I have 'suffered' at all throughout this whole experience it is only in knowing how much suffering I have put you all through," Mueller wrote.

She also wrote that her family should not be responsible for the negotiation of her release, saying it "should never have become your burden."

"None of us could have known it would be this long but know I am also fighting from my side in the ways I am able + I have a lot of fight left inside of me. I am not breaking down + I will not give in no matter how long it takes," she wrote.

Mueller said she relied on memories of camping trips with her family and her faith to survive captivity, that "by God + by your prayers I have felt tenderly cradled in freefall."

Below is Mueller's letter as reported by ABC News:

"Everyone,

"If you are receiving this letter it means I am still detained but my cell mates (starting from 11/2/2014) have been released. I have asked them to contact you + send you this letter. It's hard to know what to say.

"Please know that I am in a safe location, completely unharmed + healthy (put on weight in fact); I have been treated w/ the utmost respect + kindness. I wanted to write you all a well thought out letter (but I didn't know if my cellmates would be leaving in the coming days or the coming months restricting my time but primarily) I could only but write the letter a paragraph at a time, just the thought of you all sends me into a fit of tears.

"If you could say I have 'suffered' at all throughout this whole experience it is only in knowing how much suffering I have put you all through; I will never ask you to forgive me as I do not deserve forgiveness. I remember mom always telling me that all in all in the end the only one you really have is God. I have come to a place in experience where, in every sense of the word, I have surrendered myself to our creator b/c literally there was no else....+ by God + by your prayers I have felt tenderly cradled in freefall.

"I have been shown in darkness, light + have learned that even in prison, one can be free. I am grateful. I have come to see that there is good in every situation, sometimes we just have to look for it. I pray each day that if nothing else, you have felt a certain closeness + surrender to God as well + have formed a bond of love + support amongst one another...

"I miss you all as if it has been a decade of forced separation. I have had many a long hour to think, to think of all the things I will do w/ Lex, our first family camping trip, the first meeting @ the airport. I have had many hours to think how only in your absence have I finally @ 25 years old come to realize your place in my life.

"The gift that is each one of you + the person I could + could not be if you were not a part of my life, my family, my support. I DO NOT want the negotiations for my release to be your duty, if there is any other option take it, even if it takes more time. This should never have become your burden. I have asked these women to support you; please seek their advice. If you have not done so already, [REDACTED] can contact [REDACTED] who may have a certain level of experience with these people.

"None of us could have known it would be this long but know I am also fighting from my side in the ways I am able + I have a lot of fight left inside of me. I am not breaking down + I will not give in no matter how long it takes.

"I wrote a song some months ago that says, 'The part of me that pains the most also gets me out of bed, w/out your hope there would be nothing left...' aka -­ The thought of your pain is the source of my own, simultaneously the hope of our reunion is the source of my strength. Please be patient, give your pain to God. I know you would want me to remain strong. That is exactly what I am doing. Do not fear for me, continue to pray as will I + by God's will we will be together soon.

"All my everything, Kayla"