The Queen has discussed her personal faith in the foreword to a new book marking her 90th birthday.
The Press Association reported that, writing in ‘The Servant Queen And The King She Serves’, the Queen said: "I have been – and remain – very grateful to you for your prayers and to God for his steadfast love. I have indeed seen his faithfulness."
In her comments, the Queen refers to the changes she has seen in her life, which has made her the longest-reigning monarch in British history.
"The extent and pace of change has been truly remarkable," she said.
"We have witnessed triumphs and tragedies."
The monarch also took the opportunity to allude to the current problems in the Middle East saying the world is now experiencing "terrible suffering on an unprecedented scale".
The book, published by the Bible Society, churches' group HOPE and LICC (the London Institute for Contemporary Christianity), is being released in April to mark the Queen's 90th birthday.
The Queen has often referred to her Christian faith and holds the title Defender of the Faith and Supreme Governor of the Church of England.
In her Christmas broadcast last year, she spoke of how the nativity story continued to inspire Christians around the world.
She added: “Despite being displaced and persecuted throughout his short life, Christ's unchanging message was not one of revenge or violence but simply that we should love one another.
“Although it is not an easy message to follow, we shouldn't be discouraged; rather, it inspires us to try harder: to be thankful for the people who bring love and happiness into our own lives, and to look for ways of spreading that love to others, whenever and wherever we can.”