The biggest weakness of the movie is the way it depicts a pessimistic view of earth's future; this is not consistent with our current scientific trajectory, or with a spiritual view of earth. For a scientific movie, the explanation of how earth is losing oxygen has little realistic foundation. It also makes no sense how poorly prepared people are for the recurring dust storms and loss of atmosphere. Perhaps they are trying to make an environmental point with this; but mostly it seems, it is essential to the plot line that the world is ending, and dust is the vehicle that reveals the gravity anomaly.
There are two other remarkable scenes that emphasize the power of love and how it is expressed through the human body and most importantly that it is the nature of the universe ultimately to serve embodied love . When cooper is in the black hole he realizes and expresses that the 'they' is himself, and that his desire and presence created the structure in the black hole to accommodate his human form to communicate to his daughter. Since love is the internal correspondent of gravity, gravity folded space so that he can be in the presence of his daughter from the past. The subtext in this scenario is that God or the supreme power is providentially creating and guiding them to this point. Formerly this supreme power was expressed as 'they', and now it is scene that 'they' is within him. The second scene that emphasizes this has two parts; Earlier in the movie a presence reaches out to brand and she identifies it as 'they' spiritually reaching out to her; and she, with great wonder and passion, shakes its hand. Later as Cooper is moving through wondrous lights out of the black hole he sees Brand in a spiritual way and holds her hand with love and care. These two moments are one in space folded. Another principle this is showing is that love is pre-conscience, yet it is the true formative power of our life and seat of our being. In spiritual psychology this means that our internal self determines our true state, but we are most often unaware of it; also that God knows our true state of love better than we do. For instance, Cooper's love for brand is awakened in the black hole experience when he touches Brand's hand, but he only fully becomes aware of this consuming love at the end when his daughter tells him to go to her.
When cooper is behind the bookcase in the black whole he can not directly communicate with his daughter. This is a depiction, or allegory, of how it is between the spiritual and natural world. The spiritual world exists in us in a very internal way, but not in the external except by correspondences. Put in a linear way, there is a discreet degree between these worlds that cannot be crossed bodily or physically, but affection from our soul in the body can be felt. This truth is depicted in the movie by Cooper being called Murph's 'ghost'. Affection or love is the bridge between the physical and spiritual world. The internal state of affection is pre-conscience until our desire and circumstance (God's providence) bring us to the point of integration where our real state of love becomes an awareness, - and this is a very spiritual thing that inherently includes an acknowledgement of God. It is a universal principle of spiritual psychology that all thought is preceded by affection, and that the influx of love and wisdom that created and sustains the universe comes from God.