The Christian lives a life that tends toward God. Actually, it is more of a flight towards God and it is a movement that is above all interior. This is contrary to life as viewed by the post-postmodern world. Today, life is viewed as an end in itself; however, for the Christian life is not an end in itself, it is a means. For the Christian life is to love.
When we think of love we think of the heart. St. Teresa of Avila wrote of the heart as having a capacity of willing and choosing. If we want to have a better Christian understanding of the relationship between the heart and love then the post-postmodern world needs to understand that for the Christian “God is love”. Yet, Christians understand that their hearts are poor...poverty of spirit is what they call this. Their capacity is small. Christians desire above all to have this capacity expanded and filled. This desire then is for God. This poverty of spirit is because one cannot desire God in a supernatural manner unless God gives this desire and communicates it through humility.
Therefore, the Christian expands this life, this capacity to love, through prayer. Prayer - contact with God. And what do Christians ask of God?
-for the gift of Himself
-for His grace
-for the gift of the Kingdom
The life of a Christian is and ought to be a continual prayer. Surely, then one can see that this is interior. But, all prayer attracts or leads to an act of love (at least it ought to).
There is another condition that is in effect for the Christian: that is suffering, the cross. Why? Because in order to have the Christian life in you, you have to renounce your natural life. The Christian renounces natural life by turning away from selfish joys and from seeing life as an end in itself. Then the Christian is able to turn towards that end which is the true goal - God. This renouncement is a death...mortification.
The moment one enters the Christian life - one enters into opposition with those who do not live it. The world does not understand them.
One final note is that Christians hold fast to the Church for this is a place that also expands this life. Christ gave the Church power; power to administer sacraments and to guide past obstacles to eternal life. Without the Church there is no truth, no sacraments, and no sure direction for the Christian.