Well, I don't think a specific role can destroy your voice. What can destroy your voice is when you... make an error. Everybody can make an error. But then you need to realize what is your way.
Cecilia Bartoli

What is earnest is not always true; on the contrary, error is often more earnest than truth.
Benjamin Disraeli

What is tolerance? It is the consequence of humanity. We are all formed of frailty and error; let us pardon reciprocally each other's folly - that is the first law of nature.
Voltaire

What passes for optimism is most often the effect of an intellectual error.
Raymond Aron

When a scientist is ahead of his times, it is often through misunderstanding of current, rather than intuition of future truth. In science there is never any error so gross that it won't one day, from some perspective, appear prophetic.
Jean Rostand

When I made Blue Moon Swamp, there was a lot of trial and error; I was trying to find people who would be simpatico with my style, and with what I had in mind for the album.
John Fogerty

Where we're not wrong or where the cost of settling is so much that it is totally disproportionate to the harm or the error that we made, we're not going to settle.
Lee Scott

Whoever conquers a free town and does not demolish it commits a great error and may expect to be ruined himself.
Niccolo Machiavelli

You don't learn from a situation where you do something well. You enjoy it and you give yourself credit, but you don't really learn from that. You learn from trial and error, trial and error, all the time.
Suzanne Farrell

You have to find out what's right for you, so it's trial and error. You are going to be all right if you accept realistic goals for yourself.
Teri Garr