The Hollywood actor was a passenger in a vintage muscle car when the driver lost control, sped down an embankment and slammed into a tree near Malibu.
Hart suffered major back injuries in the crash, which authorities blamed on reckless driving.
Hart, 40, has now returned to social media and shared a video to Instagram documenting his recovery from September's smash.
The star of films including Ride Along, Get Hard and The Upside is shown lying in a hospital bed, being assisted by nurses and using a walking frame to stand up.
"Basically you realise you're not in control," he said.
"No matter how much you think you're in control, you're not in control. At the end of the day it can all be over.
"When God talks you've got to listen. I swear life is funny because some of the craziest things that happen to you end up being the thing you needed most.
"In this case I honestly feel like God told me to sit down. When you're moving too fast and you're doing too much, sometimes you can't see the things you're meant to see.
"After my accident I see things differently, I see life from a whole new perspective," Hart said.
Hart is also filmed undergoing physical therapy lessons at his home. His three children appear in the video, as does his wife, Eniko.
"My appreciation for life is through the roof. I'm thankful for my family, my friends," he said.
Hart thanked fans for their "love and support," adding: "Don't take today for granted because tomorrow's not promised. More importantly I'm thankful for God, I'm thankful for life. I'm thankful for simply still being here."
The actor said he's on the road to being a better version of himself.
Hart was taken to hospital after his 1970 Plymouth Barracuda, driven by his friend Jared Black, smashed into a tree on the Mulholland Highway near Malibu on 1st September, according to a report from the California Highway Patrol.
Evidence from an examination of the Plymouth suggested no-one had been wearing seat belts.
Hart will next appear in Jumanji: The Next Level, a film he completed before the crash. The movie is set to be released in December.
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