Quote: I believe heart and spirit and conscience are all the same.
Let’s look at the verse you quoted "A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh”. Ezekiel 36:26
A new heart AND a new spirit… so there different not the same. But lets look at what the bible says what the heart is.
The heart is the thinking aspect of man. "For as he thinks in his heart, so is he.” Prov. 23:7 Jesus asks, "Why do you think evil in your hearts?” Matt. 9:4 "For out of the heart proceed evil thoughts.” Matt. 15:19 "If that evil servant says in his heart, ‘My master is delaying his coming.’” Matt. 24:48. The evil servant says this in his heart because that is what he is thinking. "But Mary kept all these things and pondered them in her heart.” Luke 2:19 Mary thought about these things and mulled them over in her mind. One could go on and find verse after verse in the Bible teaching the same thing about the heart being the place of thought, reasoning, and understanding within man.
Quote: Our Mind can be controlled by Flesh (Emotions) or by Spirit (Heart).
The heart is the will of man, it is hard to separate the will from thought but I think there is this much difference in it ”“ the will provides man with the determination to carry through with his thinking. Daniel was told in a heavenly vision, "From the first day that you set your heart to understand, and to humble yourself before your God, your words were heard.” Dan. 10:12 Daniel willed or determined to understand and to humble himself. "Set your heart” means to "will in your heart.” "Take from among you an offering to the Lord. Whoever is of a willing heart” Exod. 35:5 One cannot obey God whose heart is unwilling. No man has obeyed the gospel who did not first find it in his heart to do so, will in his heart to do it.
Quote: Our Mind can be controlled by Flesh (Emotions) or by Spirit (Heart).
The heart is a man’s feelings or emotions. "The Lord was sorry that he had made man on the earth, and he was grieved in his heart.” Gen. 6:6 Grief is ascribed to God’s heart on this occasion but is also ascribed to man’s heart, "Your heart should not be grieved.” Deut. 15:10 The heart sorrows, "Even in laughter the heart may sorrow.” Prov. 14:13 Joy resides in the heart, "My servants shall sing for joy of heart, but you shall cry for sorrow of heart.” Isa. 65:14 Rejoicing takes place in the heart, "Your heart will rejoice.” John 16:22
In fact, all of the following emotions can be found in the heart (check the passages out for yourself): gladness Psalms 4:7, desires Psalms 20:4, 73:7, Prov. 6:25, is troubled Psalms 25:17, trusts Psalms 28:7, is broken Psalms 34:18, suffers turmoil Psalms 38:8, fails one Psalms 40:12, is pained Psalms 55:4, is proud Psalms 101:5, hates Psalms 105:25, is wounded Psalms 109:22, is distressed Psalms 143:4, despises Prov. 5:12, is anxious Prov. 12:25, is bitter Prov. 14:10, is merry Prov. 15:13, is haughty Prov. 18:12, is proud Prov. 21:4, envies Prov. 23:17, delights Prov. 27:9, anguishes 2 Cor. 2:4. This list is not meant to be exhaustive of all the emotions of which the Bible speaks that are attributed to the heart.
Quote: I believe heart and spirit and conscience are all the same.
The heart is a man’s conscience. When Peter preached on the Day of Pentecost the Bible says of many who heard him that they "were cut to the heart.” Acts 2:37 They felt guilty. Their conscience was bothering them. See also Acts 23:1 and John 8:9 for other passages teaching the same. One cannot separate the conscience from the heart.
The heart from the bible is your mind, your will your emotions and your conscience, or as we also called it our soul.