Material and spiritual

I just started reading this brilliant paper by Prof. William Hatcher (who was a professor of mathematics at Laval University in Quebec) on The Concept of Spirituality. So far it seems to be one of the most well laid-out essays on this topic. Here's an excerpt from the initial sections that is quite insightful and thought-provoking:

"The experience of our life during the period when the body and the soul are linked is one of a tension between contradicting and opposing forces. `Abdu'l-Bahá explains that this tension results from the duality of the physical and the spiritual in man's nature. On the one hand, man's body has legitimate physical needs which cry for satisfaction: food, shelter, companionship, and protection from threatening forces. However, in seeking to satisfy these needs, man is easily led to be possessive, aggressive, and insensitive to the needs of others. On the other hand, man's soul also has intrinsic needs that demand satisfaction. These needs are metaphysical and intangible. They incite the individual to seek meaning and purpose in life and to establish the proper relationship with God, with himself, and with his fellow humans. Though this proper relationship may, and indeed must, be expressed through physical means, it also is essentially intangible. It involves submission to the will of God, the acceptance of our dependence on a power higher than themselves. It implies self-knowledge, the discovery both of our limitations and of our particular talents and capacities. And it requires recognition of and respect for the rights of others. This means that we realize and understand that all other men have needs similar to our own and that we accept all the implications of this fact in our relations with and actions towards others...

...the tension between the material and spiritual in man is a creative tension purposely given by God, a tension whose function it is constantly to remind the individual of the necessity of making an effort in the path of spiritual growth. Moreover, the existence of the physical body with its needs provides daily opportunities for the individual to dramatize through action the degree of spirituality he has attained and to assess realistically his progress."