Romans 5:4

ὑπομονὴν κατεργάζεται : has as its fruit, or effect, endurance. ὑπομονὴ has more of the sense of bravery and effort than the English “patience”: it is not so passive. ἡ δὲ ὑπομονὴ δοκιμήν : endurance produces approvedness its result is a spiritual state which has shown itself proof under trial. Cf. James 1:12 (δόκιμος γενόμενος = when he has shown himself proof). Perhaps the best English equivalent of δοκιμή would be character. This in its turn results again in hope: the experience of what God can do, or rather of what He does, for the justified amid the tribulations of this life, animates into new vigour the hope with which the life of faith begins.