The idea that we live as examples to the possibility of the connection with God in two different plains of existence eludes too many Christians. Spiritually, being a citizen of Heaven while pilgriming on this earth in bodies of earth, is key to the witness we are. David stated it clearly,

"12 Hear my prayer, O LORD, and give ear unto my cry; hold not thy peace at my tears: for I am a stranger with thee, and a sojourner, as all my fathers were. Ps 139;12"

Just by existing in these realities, God uses our witness to crush the head of the serpent with every step.  So beautiful are the feet of them that bring good news trampling on Satan's evil plot to separate us from our creator.  

Ro 10:15 And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
Ge 3:15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
Pr 25:25 As cold waters to a thirsty soul, so is good news from a far country.

Believe and step like it!!!