All our days we carry it
Or it carries us
In our chest we bear it
All our days we must
It hungers it thirsts
When it needs it feeeds

It give the tongue its words
And forces the hands' deeds
It pours forth desire
For earth, posession, and pride
Our years are washed away
By its relentless tide

Until the One comes
Changes its streams
Now it loves righteousness
And of heaven it dreams

But how qucikly its called
To return to dust and to death
It falters at a glance
It faints at a breath

Who can bare this beast
Within our breast?

Jeremiah 17:9
The heart is deceitful above all things, and desperately sick; who can understand it?

Mark 7:21
21For from within, out of the heart of man, come evil thoughts, sexual immorality, theft, murder, adultery,

Proverbs 4:23
Keep your heart with all vigilance, for from it flow the springs of life.

Ezekiel 11:19
And I will give them one heart, and a new spirit I will put within them. I will remove the heart of stone from their flesh and give them a heart of flesh,

Psalm 51:10
10 Create in me a clean heart, O God, and renew a right spirit within me.