For gold is tried in the fire ...

For gold is tried in the fire and acceptable men in the furnace of adversity.
For gold is tried in the fire and acceptable men in the furnace of adversity.

More phrases

We are in a survival mentality, and that's hard-wired into our humanity, because we are the winners of an evolutionary struggle of millions and millions and millions of years.
 John Shelby Spong
I've always come back from adversity, and I've always had the mentality of proving people wrong.
 David Beckham
I like to challenge hitters with a 'Here it is, hit it,' mentality. It's definitely a big part of my game, especially when I get in situations where I need it. I usually save a little bit so it's there for me.
 Justin Verlander
If a warrior is to succeed at anything, the success must come gently, with a great deal of effort but with no stress or obsession.
A warrior takes his lot, whatever it may be, and accepts it in ultimate humbleness. He accepts in humbleness what he is, not as a grounds for regret but as a living challenge.

Quotes from the same author

America is a young country with an old mentality.
One's friends are that part of the human race with which one can be human.
Friendship is almost always the union of a part of one mind with the part of another; people are friends in spots.
Those who cannot learn from history are doomed to repeat it.
Saints cannot arise where there have been no warriors, nor philosophers where a prying beast does not remain hidden in the depths.