'Heart' in the Bible

and it hath been to you for a fringe, and ye have seen it, and have remembered all the commands of Jehovah, and have done them, and ye search not after your heart, and after your eyes, after which ye are going a-whoring;

And Moses saith, 'By this ye do know that Jehovah hath sent me to do all these works, that they are not from my own heart;

If Balak doth give to me the fulness of his house of silver and gold, I am not able to pass over the command of Jehovah, to do good or evil of mine own heart -- that which Jehovah speaketh -- it I speak?

and why discourage ye the heart of the sons of Israel from passing over unto the land which Jehovah hath given to them?

and they go up unto the valley of Eshcol, and see the land, and discourage the heart of the sons of Israel so as not to go in unto the land which Jehovah hath given to them;