Sleep is a beautiful thing. To me, it’s a time where our body relaxes, so that our mind is free to dream.
Some people can really sleep for hours on end. And some cannot, no matter how hard they try.
It does make me wonder. And then, I came across this Lifestyle article in The Guardian yesterday – it was about “Fifty Shades of Grey” actor, Dakota Johnson (left) who says sleep is her top priority in life, followed by meditation, working out and a lot of baths.
She promptly adds: “I’m not functional if I get less than 10. I can easily go 14 hours”.
She is the very opposite of Margaret Thatcher (left).
The latter is famously said to have slept for only four hours a night.
Bernard Ingham, her Downing Street press secretary confirmed: "She slept four hours a night on weekdays. I wasn't with her at weekends. I guess she got a bit more then".
Indefatigability became part of her mystique. She would keep her officials up working on a speech until two or three in the morning and then be up by five in time to listen to “Farming Today”.
People use it as a benchmark of endurance, often jokingly referring to those who need much more.
Her biographer John Campbell, author of The Iron Lady, said her late-to-bed, early-to-rise routine made her the "best informed person in the room". Occasionally husband Denis would snap. "Woman – bed!" he was reputed to have shouted on one occasion.
Her frugal sleep pattern created a problem for her successor John Major. "He found it difficult coming after her because the civil service had got used to a prime minister who never slept, and he used to sleep eight hours a night", Campbell said.
Sleep comes to be seen as part of a leader's character. When Napoleon Bonaparte (right) was asked how many hours sleep people need, he was said to have replied: "Six for a man, seven for a woman, eight for a fool".
For the Iron Lady four hours was a badge of almost superhuman strength. It fit the narrative of the "warrior" prime minister as set out by the Times' Matthew Parris in 2013.
"She understood that this was war when others didn't. And in war you need a warrior", he wrote.
In fact, World War II leader Winston Churchill (right) survived on four hours a night during the war. But what is less often noted is that he had regular afternoon naps in his pyjamas.
Thatcher was not one for these afternoon sleeps. "No, she wasn't a napper", Ingham asserted.
In the world of business, it is certainly something people strive for. Apple CEO Tim Cook reportedly only sleeps from 10:00 PM to 03:45 AM each day. Other high-profile chief executives from Marissa Mayer at Yahoo! to Pepsi's Indra Nooyi got by on four hours a night, while Donald Trump claims to survive on three.
Serial entrepreneur Richard Branson is known to sleep between five and six hours a night and is an early riser. Branson has found that getting up early allows him to achieve more during the day and therefore, his life.
There's no correct amount of sleep, declares Prof Kevin Morgan (left), of Loughborough University's sleep research center. The only rule is to sleep long enough to feel refreshed when you wake up.
For about 1% of people – probably including Thatcher – this will be as little as four hours a night, maintains Morgan.
You can't just suddenly become someone who sleeps this little, he argues. It's likely to have been a pattern common to her life before becoming prime minister.
The late Prof James Horne (left), who was with Loughborough's sleep research center, had ventured to explain that mood is critical. Soldiers high on adrenalin can function on little sleep: "It all depends if one gets a buzz out of what one's doing. If you're despondent, you tend to sleep more; if you're excited you need less. Margaret Thatcher was someone who felt on top of things".
The average adult sleeps seven hours a night but many sleep considerably less than this, especially people over 50. So, it's possible that Thatcher fell within the range of normality rather than the 1%, Horne argues.
She may have sometimes slept four hours and made up for her deficit by sleeping a little longer on other nights; "You tend to attribute great things to great people, that they need no sleep or no food and have superhuman qualities".
In the world of politics, Thatcher is not alone. George W Bush was in bed by 10 but his predecessor Bill Clinton, worked late and got by on four or five hours. During his time as president, Barack Obama was clocking up six hours of sleep a night or less.
For artists, sleep deprivation carries a whiff of creative drive and raucous hedonism. Keith Richards, the Rolling Stones guitarist, once stayed awake for nine days – when he fell asleep, he fell down so quickly that he broke his nose.
He makes a worse advert than Thatcher did.
What about me? I get on by with four hours’ sleep too. Sometimes, three.