There truly was nothing that Williams couldn’t accomplish on screen.

To provide some answers, here’s a look into the final year of Robin Williams' life.

He underwent heart surgery four years prior, which he discussed in a September 2013 interview withCBS News.

Robin Williams close-up

“The cow valve is still working,” Williams quipped about his heart.

“I can crap standing up,” he added, before taking a drink from his coffee cup.

“Morning, everybody.”

Robin Williams in 2005

Talk about Williams being in his usual, irreverent form!

“You get a big second chance,” he continued.

“It’s a giant reboot.

Robin Williams holding his Golden Globe

Your whole system reboots and you appreciate everyone and everything.

Every day above ground as they say.”

That had to feel pretty amazing.

Robin Williams at a 2006 benefit

The procedure took three-and-a-half hours at the Cleveland Clinic.

However, in 2006, Williams relapsed and began drinking again, before checking into rehab for two months.

“This is his version of a retreat.”

Robin Williams looking to his right

It was known that the actor had depression, perNBC News, while many suspected bipolar disorder as well.

Williams also suffered from panic attacks and had one in April of 2014, asThe Mercury Newsnoted.

“As he would say to me, ‘I’m a little crispy.’

Robin Williams at the People’s Choice Awards

I didn’t know what was happening, except he wasn’t happy.”

During that encounter, Crystal also was shocked at Williams' appearance.

“He was thinner and he seemed a little frail.”

Robin Williams at the TV Land Awards

“Robin was very depressed.

“He was in a funk.”

“He also had a slight tremor in his left hand that would come and go.”

Robin Williams at the People’s Choice Awards

Things would go on to get much worse for Williams, who was eventually diagnosed with Parkinson’s disease.

“You could say he had chemical warfare in his brain,” Schneider Williams added.

Were finances an issue for Robin Williams?

Robin Williams wearing glasses

“There are bills to pay,” he declared in an interview withParade.

“My life has downsized, in a good way.

I’m selling the ranch up in Napa.

Billy Crystal and Robin Williams

I just can’t afford it anymore.”

Williams added that he returned to television for the pay, as it’s more lucrative than films.

But, as we know, Williams' television return didn’t go as well as he had hoped.

Robin Williams at the 2010 Oscars

Additionally, his 2008 split from Marsha Garces Williams certainly had an impact on his finances.

“Divorce is expensive,” he continued.

It’s ripping your heart out through your wallet.”

Robin Williams at a 2011 premiere

“Nothing seemed to alleviate his symptoms for long.”

We take comfort in the fact that Williams seemingly did everything he could to survive.

“Because he was suffering from severe depression.”

Susan Schneider Williams, Robin Williams

“I never heard him afraid like that before,” he toldEntertainment Tonight.

“This was the boldest comedian I ever met the boldest artist I ever met.

But this was just a scared man.”

Robin Williams in 2014

“He was sobbing in my arms at the end of every day.

Horrible,” she confessed in “Robin” by David Itzkoff (viaPeople).

“I said to his people, ‘I’m a makeup artist.

I don’t have the capacity to deal with what’s happening to him.'”

For example, he had a beautiful answer when asked about what keeps things wondrous for him.

“My children give me a great sense of wonder,” he gushed.

“Justto see them developinto these extraordinary human beings.”

“They definitely shaped how I am now,” he continued.

“They really made me deeply appreciate human contact.

And the value of friends and family, how precious that is.”

That really is beautiful.

“That every moment in life is precious?

That the gifts of your relationships with others, don’t miss it,” he added.

And these struggles presented significant challenges in his path.

“Throughout all of this, Robin was clean and sober,” she wrote.

That sounds so awful, we just can’t imagine.

Williams was cognizant of his decline, which understandably bothered him significantly.

Williams was losing his ability to reason as well, which only made things more difficult.

Sadly, Williams committed suicide on August 11, 2014, according toThe Hollywood Reporter.

“And then he came back again.

He came out with his iPad, and he looked like he had something to do.”

“And then he said ‘goodnight, goodnight.’

That was the last.”