Queen tells of gratitude to country in book marking her 90th birthday
The Queen has said she is "very grateful" for the country's prayers and that she has felt God's "faithfulness" throughout her reign.
Writing in a foreword for a new book, The Servant Queen And The King She Serves, the monarch writes of her enduring Christian faith.
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.
She writes: "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."
The Queen also 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".
Prince Charles has stressed the importance of using correct grammar as he backed an appeal for funds to ensure great works of literature can be accessed in the National Libraries.
Charles recalled being read to as a child by his father, the Duke of Edinburgh, and said that experience sparked his fascination with language.
He described the moment he first heard The Song Of Hiawatha by Henry Wadsworth Longfellow as "electrifying".
He said: "Words navigate us through life like pathfinders. As Shakespeare says at one point, 'I shall lose my life for want of language'. I know what he means."
Using grammar properly allows the reader to understand what the writer is trying to convey, Charles said.
"If we stop using commas, or even full stops, I do wonder how we can hope to make sense of the world. Grammar matters!" he said.
Charles is Royal Patron of the Friends of the National Libraries (FNL) charity.