“There are two important days in a woman's life: the day she is born and the day she finds out why.”
Source: When Women Were Birds: Fifty-four Variations on Voice
This appears on the opening placard of the film The Equalizer, attributing it to Twain, but there is no evidence that Twain wrote it. A precursor is found in Taylor Hartman's self-help book The Character Code (first published 1991), where it is not attributed to Twain: "The three most significant days in your life are: 1. The day you were born. 2. The day you find out why you were born. 3. The day you discover how to contribute the gift you were born to give" ( Google Books link https://books.google.com/books?id=gIKCxWxNmeMC&pg=PA147&dq=%22day+you+find+out+why%22&hl=en&sa=X&ved=0ahUKEwijrJzc84vLAhUJzGMKHajvADEQ6AEIIjAB#v=onepage&q=%22day%20you%20find%20out%20why%22&f=false)
Disputed
“There are two important days in a woman's life: the day she is born and the day she finds out why.”
Source: When Women Were Birds: Fifty-four Variations on Voice
“There are two most powerful days in your life: the day you're born, and the day you discover why.”
The day I stood up alone
Context: There are two most powerful days in your life: the day you're born, and the day you discover why. That day standing up in that stadium shouting at the President, I discovered why I was truly born, that I would no longer be silent in the face of injustice.
“There are two great days in a person's life - the day we are born and the day we discover why.”
“the day you were born, you were born free. That is your privilege.”
Lyrics, Make Yourself (1999)
“How you start your day is how you live your day. How you live your day is how you live your life.”
Source: Heal Your Body A-Z
“Find a job you enjoy doing, and you will never have to work a day in your life.”
“You're the bad one from the day you were born.”
Until When We Are Ghosts (2006), When You Were Young
“You are the most fascinating and important thought of my days.”
From the Quotes http://www.prevale.net/quotes.html page of the official website of Prevale
Original: (it) Sei il pensiero più affascinante ed importante dei miei giorni.
Source: prevale.net