By engaging in the Lord's service, we free ourselves from all karma, good or bad. We finally understand that all our suffering is due solely to our past karma. We know well that the condition of both the body and the soul depends on Krishna.
In reality, the devotee takes care of their body out of duty, so that they can better serve the Lord. Whatever their situation, the devotee maintains a spiritual outlook and uses their body only for spiritual purposes. This is true medicine, the medicine that puts an end to all illnesses.
Every action itself generates an effect, thus strengthening the material chain that keeps its perpetrator ever more imprisoned in matter, and consequently suffering. This chain of actions and the resulting consequences can only be broken when one places oneself in the service of God and acts for Him.
All those who uphold the impersonalist doctrine must become a tree in their next life.
The impersonalist is one who refuses to believe that God has a fully spiritual body in human form. For them, God is an Eternal Spiritual Being without form, being only pure energy.
Unlike the impersonalist, the personalist knows that God, the Supreme Spiritual Personality, in His personal, primordial, original, infinite, and absolute form, has a body whose form is the one He gave to mankind.
It is written in Genesis 1:26 and 27: And God said, “Let Us make man in Our image, according to Our likeness.” “So God created man in His own image; in the image of God He created him; male and female He created them.”
Krishna, the Supreme Personality of Godhead, gave man a body whose form is identical to His own. Lord Krishna's form is entirely and purely spiritual, of indescribable beauty, full of absolute knowledge, of the most perfect bliss, of complete truth, of sublime, infinite, absolute, and eternal reality.
Krishna, the Eternal Supreme, says of Himself: My spiritual and absolute body resembles the human form in every way, but it is not a material body. It is inconceivable (that is why it is never subject to hunger, thirst, or fatigue, and has no veins). I am not compelled by nature to accept a particular type of body; I choose the form in which I appear of My own free will. My heart is also spiritual, and I am always full of benevolence towards My devotees. Thus, one can discover in My heart the path of devotional service, intended for holy beings, while I have rejected irreligion and non-devotional activities; they hold no attraction for Me. Because of all these divine attributes, prayers are generally addressed to Me as Rsabhadeva, the Supreme Lord, the best of all living beings.