And according to his faith there was a mighty change wrought in his heart. Behold I say unto you that this is all true.
And behold, he preached the word unto your fathers, and a mighty change was also wrought in their hearts, and they humbled themselves and put their trust in the true and living God. And behold, they were faithful until the end; therefore they were saved.

But this shall be the covenant that I will make with the house of Israel; After those days, saith the Lord, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.

COMMENTARY

According to his faith there was a mighty change wrought in his heart
After those days, saith the Lord, I will put my law in their inward parts, and write it in their hearts
I do believe that most of us try to follow our conscience and live as best we know how. We may all be at different stages of how well we adhere to that pricking of our heart, but we are at least trying to follow it to some degree. And I believe most of us would like to take that guide in our hearts, and ever strive to improve on that, and that alone.
Yet the scriptures speak of a different experience. They speak of “mighty changes of heart.” They speak of people who thought they knew what they were supposed to do, and then discovered that they ought do something else instead. Saul’s problem was not that he needed to follow his convictions more firmly, it was that he needed to throw them out and replace them with entirely new ones!
Our hearts are good and our consciences are wonderful. We will do very well just by adhering to them alone. But we are also somewhat flawed and misaligned, and if we are ever to find our true potential we have to accept that there are convictions of ours that have to be released, and convictions that aren’t ours which have to be adopted. A mighty change of heart is necessary for us all.