Mere courage and daring, and the rewarding of courage and daring, cannot supply the lack of discipline, of ability, of honesty.
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“the resolute warfare against every kind of criminal who had hitherto been able corruptly to purchase protection; the prompt recognition of ability even where it was entirely unconnected with personal prowess—all these were elements which had enormous weight in producing the change. Mere courage and daring, and the rewarding of courage and daring, cannot supply the lack of discipline, of ability, of honesty. But they are of vital consequence, nevertheless. No police force is worth anything if its members are not intelligent and honest; but neither is it worth anything unless its members are brave, hardy, and well disciplined.” source