Queen Elizabeth II has faced one of the most difficult years of her life.
In April, she lost her husband of 73 years, Prince Philip, just short of his 100th birthday. Her second son Prince Andrew is still facing legal woes even after exiting public life over his controversial friendship with convicted sex offender Jeffrey Epstein. And her grandson, Prince Harry, allegedly still has a strained relationship with the British royal family after he and his wife, Meghan Markle, stepped back as senior members.
And then in the late fall, the reigning monarch, 95, had several health setbacks, which stirred headlines. She has since been largely confined to Windsor Castle.
In the latest issue of PEOPLE Royals, out on Friday, the queen’s biographer Ingrid Seward told the outlet that "her ability to compartmentalize has been extremely helpful in her life" as she balances both her personal and public life.
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"Fundamentally she puts things in a box and says ‘that can be dealt with on Thursday,’ for example," Seward explained. "She won't let things crowd in on her. She is mentally disciplined and that has helped her through these 70 years. It has enabled her to deal with all the things and not allow things to overwhelm her. It goes a long way towards explaining her ability to be able to still be working at this age."
Elizabeth is expected to be surrounded by her family during Christmas at Sandringham House in Norfolk. According to the outlet, she will stay there until after the anniversary of the February 6th death of her father, King George VI. It will be the first time in 73 years without Philip by her side.
"She will be missing his companionship deeply," a palace insider told the outlet. "But she is a very stoic person."
Another source told the outlet that her "religious faith" has been essential during such tough times.
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"It feels to me, she can carry on for some time," the insider added.
Back in October, royal author Matthew Dennison told Fox News that the queen has been turning to her Christian faith to overcome the ongoing drama rocking the palace.
"She has a strong religious faith," he shared. "One of the things that the queen has done is pray throughout all of this. She also has a loyal, supportive group of private secretaries, ladies in waiting and devoted friends who have been a strong system around her. She also has the support of her close-knit family."
"She finds it difficult to confront difficult issues," he noted. "I think she has gotten better over time."
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Dennison, who has written eight critically acclaimed books, has recently penned "The Queen," a new biography that explores Elizabeth’s decades-long reign. He spoke to several palace insiders, both past and present, to tell the queen’s story. Dennison said that during his research, faith played a prominent role in the royal’s life.
"She has a connection with the divine," he explained. "She is a monarch who made a promise before God to fulfill her duty. And it’s a promise she has taken very seriously in her life. Even as a young woman, she has faced an overwhelming expectation on what kind of queen she should be… She has embraced that role."
Despite losing her beloved husband, Dennison said Elizabeth has zero plans to step down. Her eldest son Prince Charles, 73, is first in line to the throne.
"There wasn’t ever a realistic expectation that the death of the Duke of Edinburgh would lead the queen to abdicate," Dennison shared. "In the very few times she has spoken about it to her close friends, she has always been quite clear that the promises she made in her coronation are binding. These are promises she made to God in the church. These are holy promises. She’s always said she would abdicate only if she got Alzheimer’s disease, a stroke, or something that would leave her incapacitated in some way. But this role is for life."