The fashion designer was 27 when Linda McCartney lost her battle with breast cancer and her father, Beatles star Paul, took her to meet the Maharishi - the guru of transcendental meditation - tom combat their grief.
Stella told The Times newspaper: ''When my mum passed away we actually went - my dad, my brother and myself - to Holland on a special trip to go and see him. It was amazing. I watched my dad see him for the first time probably since [The Beatles' studies with him in India]. It was incredible, a real 'audience with'. I've done some amazing things in my life and I would say it's one of the things I witnessed that will have an impact on me.''
The 46-year-old designer is now a passionate advocate of transcendental meditation (TM) after it helped her through the difficult wake of her mother's death.
Stella said: ''I had quite a reaction that I didn't feel in control of. I possibly suppressed my emotions and I started having panic attacks, physical reactions to that loss. It really did help me at a time when I really needed some help.''
Stella revealed she and her father still discuss meditation, but they do not do it together.
She said: ''I do talk to Dad about it occasionally. He's a much better student. But we don't sit around the dinner table [and say], 'Oh, how was your meditation this morning?' My dad and my husband prefer to meditate on their own. I have a better meditation when I'm with Bob [Roth, Stella's meditation teacher] or in a group meditation because my mind is, like, bzzzzzzz, buzzing all the time, which Bob also says is OK.
''Dad is a huge supporter of meditation. He obviously brought TM to the awareness of most of the world, so he's clearly dedicated.''