'Heart' in the Bible

My heart [goes out] to the commanders of Israel, those offering themselves willingly among the people; bless Yahweh!

And the chiefs in Issachar [were] with Deborah; and Issachar likewise [was with] Barak; into the valley {he was sent to get him from behind}. Among the clans of Reuben [were] great {decisions of the heart}.

Why do you sit among the sheepfolds, to hear [the] calling sounds of the herds? For the clans of Reuben, [there were] great searchings of the heart.

And she said to him, "How can you say, 'I love you,' when your heart is not with me? You have mocked me these three times, and you have not told me how your strength is [so] great."