Proverbs 3:5

5 Trust in the Lord with all thine heart; and lean not unto thine own understanding.

If we only live to please our mind we only live by our flesh and what will appeal to the senses. If we are only pleased by our senses then we are very likely to accept what we see and feel as opposed to what faith tries to change in us.

If faith is the substance of things hoped for and the evidence of things not seen then we realize faith is not kept in the mind for the mind attempts to depend on sight. Faith is kept in the heart.

As the spirit stirs your faith, your faith stirs your heart, and as your continued desires before God continue your mind is transformed by not depending on sight but by what dwells inwardly.

We are tempted in our minds to change the way our heart can continue to hope. We are aggravated in the flesh to cause us to think with our mind first and not with our heart.

The mind is the part of us that thinks and reasons; the heart is the part of us that contains our deep longings and desires. Although the mind is important, the heart is even more important because it is the engine room of our personality—the part from which come our drive and motivation. That is why our Lord says,

Matthew 12:34

O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.

John 14:24

He that loveth me not keepeth not my sayings: and the word which ye hear is not mine, but the Father’s which sent me.

The heart of Jesus Christ was the very heart of God the Father; consequently, the words Christ spoke were the exact expression of God’s thought. Jesus’ tongue was always in its rightful place. He spoke not just from His head but from His heart; His heart and His mind were one.

The heart is the central altar and the mind the outer court. What we offer on the central altar will show itself in due course through the outer extremities of personality.” In the search for unity of purpose and integration, there is no doubt that the heart of the matter is the matter of the heart.

Romans 12:2

And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.

What God is trying to get us to see is that we must not live to please only our mind or only our heart but to transform ourselves to be the kind of people that (like Christ) can have their minds and hearts as one. This is known as peace

Philippians 4:6-7  

do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus.

Romans 14:17-19 

For the kingdom of God is not a matter of eating and drinking but of righteousness and peace and joy in the Holy Spirit. Whoever thus serves Christ is acceptable to God and approved by men. So then let us pursue what makes for peace and for mutual upbuilding.

2 Corinthians 13:11 

Finally, brothers, rejoice. Aim for restoration, comfort one another,agree with one another, live in peace; and the God of love and peace will be with you.

1 Peter 1:2 

according to the foreknowledge of God the Father, in the sanctification of the Spirit, for obedience to Jesus Christ and for sprinkling with his blood:  May grace and peace be multiplied to you.

Romans 5:1  

Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ