The word is still the same, “... The earnest (heartfelt, continued) prayer of a righteous man makes tremendous power available [dynamic in its working] James 5:16. AMP.
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The softening of the heart of a man is not the job of a man. I had a dream, my old time school friend who dressed as though mad stepped on my toes and went his way doing as if nothing happened, meanwhile, he waited and paused a minute to see what my reaction would be, then he would have taken offence to fight me, but I, knowing his thought by the Holy Spirit, i did as though he never stepped me. He came back, spoke out his mind that he wanted to see what i would say, but then, he broke down and was sorry for his actions, then I answered, "THE SOFTENING OF THE HEART OF A MAN IS NOT THE JOB OF A MAN" for we know that it is not by power nor by might but by the HOLY SPIRIT. For he said he will give a new heart, a heart of flesh and the stony one shall be removed!