The 74-year-old actress - who has been married three times - admitted it wasn-t until she split from third husband, media mogul, Ted Turner, that she felt "whole".
She said: "Everything came late to me - my voice, my becoming whole, my learning intimacy. All those things happened after I turned 60.
"And I think it`s a very hopeful lesson. It is never too late."
The Oscar-winning actress explained although her split from Ted - who was 11 years her senior - was "very, very, very painful", she finally became herself once their 10-year union came to an end.
Jane added in TV show `Oprah Presents Master Class`: "I remember when I was 62 and I had done something that was very, very, very painful and difficult. I had left Ted Turner, my third husband, who I loved very, very much.
"He had 23 huge properties and a private plane that slept eight, but I knew that I would die married and rich, but not whole.
"I moved into the guest room in my daughter`s home. It was a small room with no closet, me and my golden retriever, and it was perfect. I was so raw and so sad, and at the same time I could feel myself moving back into myself.
"I knew that hard and painful as this was, that I wasn`t scared of being alone. I wasn`t scared for the first time in my life to not be with a man, and that whatever lay in front of me, I would be able to do it as a whole person. It was a seminal moment for me."