'Heart' in the Bible

It happened, when all the kings of the Amorites, who were beyond the Jordan westward, and all the kings of the Canaanites, who were by the sea, heard how that Yahweh had dried up the waters of the Jordan from before the children of Israel, until we had passed over, that their heart melted, neither was there spirit in them any more, because of the children of Israel.

I was forty years old when Moses the servant of Yahweh sent me from Kadesh Barnea to spy out the land. I brought him word again as it was in my heart.

Nevertheless, my brothers who went up with me made the heart of the people melt; but I wholly followed Yahweh my God.

Only take diligent heed to do the commandment and the law which Moses the servant of Yahweh commanded you, to love Yahweh your God, to walk in all his ways, to keep his commandments, to hold fast to him, and to serve him with all your heart and with all your soul."

"Now therefore put away the foreign gods which are among you, and incline your heart to Yahweh, the God of Israel."