I would like to make sure the two following sentences are correct, comprehensible and mean the exact same thing.
A single mistake does not mark a loser.
A failure does not make one a loser.
Would you prefer one to another?
Also, I would appreciate if you could correct mistakes in my posts, should any appear.
Best Answer
The two are both correct and understandable and very close in meaning, but not exactly the same.
"A single mistake" might or might not be a "failure" and vice versa. You can fail at something without making a mistake and you can make a mistake without failing.
For example, if you start a business you will make mistakes - no one ever ran a business perfectly - but you may not have a failure, your business might succeed very well. On the other hand, if you play a game of bridge you might lose without making any mistakes.