'Heart' in the Bible

But carefully obey the commands and instructions Moses the Lord's servant gave you. Love the Lord your God, follow all his instructions, obey his commands, be loyal to him, and serve him with all your heart and being!"

"Look, today I am about to die. You know with all your heart and being that not even one of all the faithful promises the Lord your God made to you is left unfulfilled; every one was realized -- not one promise is unfulfilled!