Blessed are the pure in heart,
for they will see God.
pure - [Katharos] - clean, blameless, innocent; unstained with the guilt of anything; sincere genuine
heart - [Kardia] - of the middle or central or inmost part of anything; thoughts, passions, desires, appetites, affections, purposes, endeavours, sensibilities, affections, emotions, desires, appetites, passions, will, intelligence and character
see - [Horao] - to see with the eyes; to see with the mind, to perceive, know; to see, i.e. become acquainted with by experience, to experience
If you want to know and experience God. If you want to become acquainted with your creator. Then what needs to change is you. Right in the middle of you, of who you really are, it needs to change. It needs to become clean and pure. All guilt needs to be cleased out.
Sound impossible? It is.
That is why Christ came to this earth. To pay the penalty for the sin. To eliminate the guilt of that sin, that we might have pure hearts, therefore allowing us to "get to" God.
But this is not some distant work that will be done. It begins now. Philippians 1:6 says, "Being confident of this, that he who began a good work in you will carry in on to completion until the day of Christ Jesus." (NIV)
The work has begun, cleansing us, and sanctifying us, and one day it will be completed, and we will see God!