When we hear mention of our union with God, let us remember that holiness must be its bond; not because we come into communion with him by virtue of our holiness! Rather, we ought first to cleave unto him so that, infused with his holiness, we may follow whither he calls. But since it is especially characteristic of his glory that he have no fellowship with wickedness and uncleaness, Scripture accordingly teaches that this is the goal of our calling to which we must ever look if we would answer God when he calls.

And a highway shall be there, and it shall be called the Way of Holiness; the unclean shall not pass over it. It shall belong to those who walk on the way. Even if they are fools they shall not go astray. -Isaiah 35:8