Pure Spring from My Heart

Dear Lord in heaven,
You know exactly what is in my heart,
I wish I can have air filters for my heart so I can always have my heart pure...
Pure in my motivation,
Pure in every concern I give to anybody,
Lord, when it comes to the word 'pure' something will be so serious for me as human being has no capacity to become pure without Divine Intervention...
So please give me ability, make me pure oh Lord...
When You are within me,
a pure spring water is overflowing from my heart,
from my life...
and this thirsty world may rejoice in Your kindness,
and Your Name be glorified.