Relationship with God, words and action are the components of true Christianity, however, the Bible illuminates us more brother Mosdad:

If someone thinks that he is religious among you, and does not retain his tongue, but deceives his heart, his religion is vain. The pure and undefiled religion before God the Father is this: visit the orphans and the widows in their tribulations, and stay away from the world.
James 1: 26-27