Cannonball.

My heart, a cannonball,
Strong, hard, unyielding.
It disguises itself as a form of protection,
Yet is meant for one thing: Destruction.

My heart, a broken vessel,
The same sphere, yet cracked in half, clean in two.
Hollow and the two pieces fall at rest, open towards the sky.
Helpless and waiting to receive,
Yet meant for one thing: Service.

My heart, not my own,
In my possession yet better understood by Satan
Than by myself.
Though in my grasp,
Though influenced by this world, 
It was created by King Jesus. 
No matter how hard or broken, 
It belongs to him.  
No matter the condition, 
He will never fail to receive it.
My heart is meant for one thing: Surrender.
Surrender is meant for Salvation...and Salvation belongs to the Lord. 

Jeremiah 17

This is what the Lord says:

“Cursed is the one who trusts in man,
    who draws strength from mere flesh
    and whose heart turns away from the Lord.
6 That person will be like a bush in the wastelands;
    they will not see prosperity when it comes.
They will dwell in the parched places of the desert,
    in a salt land where no one lives.

7 “But blessed is the one who trusts in the Lord,
    whose confidence is in him.
8 They will be like a tree planted by the water
    that sends out its roots by the stream.
It does not fear when heat comes;
    its leaves are always green.
It has no worries in a year of drought
    and never fails to bear fruit.”

9 The heart is deceitful above all things
    and beyond cure.
    Who can understand it?

10 “I the Lord search the heart
    and examine the mind,
to reward each person according to their conduct,
    according to what their deeds deserve.”

11 Like a partridge that hatches eggs it did not lay
    are those who gain riches by unjust means.
When their lives are half gone, their riches will desert them,
    and in the end they will prove to be fools.

12 A glorious throne, exalted from the beginning,
    is the place of our sanctuary.
13 Lord, you are the hope of Israel;
    all who forsake you will be put to shame.
Those who turn away from you will be written in the dust
    because they have forsaken the Lord,
    the spring of living water.

14 Heal me, Lord, and I will be healed;
    save me and I will be saved,
    for you are the one I praise.