And we are to trust Him with "all" (3605) our "heart" (3820). "All" (3605) is an incredibly frequent word that means what it says. There are no hidden nuances or deep theological mysteries that require a Ph.D. It is one of the key words in following Jesus. He demands all. He requires first place. And second place. And third place. In mathematics they might say place to the nth power.
"Heart" (3820) obviously does not just mean the emotional center of our being. It is talking about the center of our reason. We would talk more in terms of the way Jesus said, "heart, mind, soul and spirit.” We would also look to Deuteronomy 6:5:
DEU 6:5 "And you shall love the \Lord\ your God with all your heart and with all your soul and with all your might. (NASB)One of the things that causes people to turn away from the living God is this demand for “all.” People try to put Jesus into niches: Great Teacher, Good Man, Meek and Mild, Pain Killer, Fire Extinguisher, etc. He demands to be Lord. Many people are like the disciples who turned away.
(John 6:60 KJV) Many therefore of his disciples, when they had heard this, said, This is an hard saying; who can hear it?I don’t believe you can lose your salvation. That sounds like losing your keys or something. But I believe that we can go apostate, we can desert our first love and, yes, fall from grace:
(John 6:66 KJV) From that time many of his disciples went back, and walked no more with him.
(Galatians 5:4 KJV) Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.You can’t fall out of something you are not in.
So? Does Jesus have your all or is He just a convenience? If you have not done so yet, please ask Him to establish Himself as total Lord of your life.