Everyone is attached to their body and mind. But if we are not this body and mind, then what are we attached to? How can we be attached to something we are not? Like if I am not my car, how can I be attached to my car. The fact is we are not attached to the car, literally speaking. We are attached to the idea of the car.
Similarly, the soul (real self) is not attached to the body or mind. But the soul which has the aspect of cognizance is "attached" to the “idea” or “thought” of being the body and mind. This idea or thought is not real or illusion. So in essence, the soul is attached to an unreal thought. The who process of spiritual life is to give up this unreal thought, not give up the body or mind but give up the unreal thought we are the body and mind.
How to do that? – by pitting another thought in its place, a more powerful thought or idea. That is, we are servants of God Krishna. But it is not that easy because over millions of years (births), we have been mentally trained to be attached to the thought or idea of body and mind. To reverse this takes a herculean effort which only Krishna can do.
For Krishna, it is just a thought. Just as He lifted Govardhan hill, Krishna can banish the thought of body and mind and replace it with His own. Simply, we pray in humility and take shelter of His grace and mercy! Otherwise, its just a thought we are attached to!