On path of self realization thinking in terms of detachment is a negative approach in life, similar as Gautama Buddha calling the entire world as dukhma, a place of misery is a total negative approach in life. How can the world created by God Almighty be a place full of sadness?
If we failed to realize the hidden precepts of spirituality contained in Bhagavad Gita, spirituality itself was not at fault nor was God Almighty. Gautama Buddha erred when he said the entire world is a place of dukhma, misery. Prime reason why Siddhartha Gautama took so long in reaching state of self realization, god realization! Siddhartha Gautama realized self at 80 years of age and at 81 he left his mortal frame.
As detailed in Bhagavad Gita seekers must indulge in spiritual routines of life with an unattached attitude (not detached), never attaching self to fruits of karma performed. We are supposed to act like a trustee, caretaker for whom everything all the time belonged to God. We were only an instrument in hands of God Almighty supposed to do his bidding all the time.
It is an absolute fact of spiritual life that we as soul atman manifest human form to work out our karma, remove dross impurities within. The human form thus is an interim arrangement for soul atman to cleanse itself of dross impurities within. The human form does not have an independent entity. Our soul atman existing in heart as the spirit is the absolute master and controller of human body. Human form is only a medium for soul atman within to reach state of absolute purity.
For working like a trustee our indulgence in karma, nishkama karma way of life is necessitated. Nishkama karma way of life demands our indulgence in karma with an unattached attitude. When everything belonged to soul atman within, the fruits of karma indulged by human form also belonged to soul atman within. If we can become, act like a trustee then we can cover spiritual journey successfully. Precept of trusteeship on path of spirituality is an important aspect of spiritual life.
JRD Tata and King Janaka (father of Sita in Ramayana) are two perfect examples of nishkama karma yogis par excellence. Both JRD Tata and King Janaka indulged in day-to-day affairs of their life with a totally unattached attitude, always working like a trustee. JRD Tata never considered Tata Empire as ones own. King Janaka never attached self to routine affairs of his kingdom. Though JRD Tata knew nothing about Bhagavad Gita, King Janaka reached stage of self realization in his lifetime.