'Heart' in the Bible

And it came to pass, when all the kings of the Amorites, which were on the side of Jordan westward, and all the kings of the Canaanites, which were by the sea, heard that the LORD had dried up the waters of Jordan from before the children of Israel, until we were passed over, that their heart melted, neither was there spirit in them any more, because of the children of Israel.

Forty years old was I when Moses the servant of the LORD sent me from Kadeshbarnea to espy out the land; and I brought him word again as it was in mine heart.

Nevertheless my brethren that went up with me made the heart of the people melt: but I wholly followed the LORD my God.

But take diligent heed to do the commandment and the law, which Moses the servant of the LORD charged you, to love the LORD your God, and to walk in all his ways, and to keep his commandments, and to cleave unto him, and to serve him with all your heart and with all your soul.

Now therefore put away, said he, the strange gods which are among you, and incline your heart unto the LORD God of Israel.