However he never said it.
The quote is:
I disapprove of what you say, but I will defend to the death your right to say it.
It was written by Evelyn Beatrice Hall (writing under the name Stephen G. Tallentyre) in The Friends of Voltaire (1906). She was writing about Voltaire, and used those words (within quotation marks, which is what has lead to the confusion) to summarize Voltaire's attitude.
A variation that I've seen frequently is:
I may not always approve of what you say, but I will defend to the death your right to say it.
The quote is:
I disapprove of what you say, but I will defend to the death your right to say it.
It was written by Evelyn Beatrice Hall (writing under the name Stephen G. Tallentyre) in The Friends of Voltaire (1906). She was writing about Voltaire, and used those words (within quotation marks, which is what has lead to the confusion) to summarize Voltaire's attitude.
A variation that I've seen frequently is:
I may not always approve of what you say, but I will defend to the death your right to say it.
Link: Click Here