The trace of gold in the alloy is invisible but becomes visible through microscope (Huamn incarnation is a combination of Son of God (a best devotee) and God). The wave nature and particle nature are visible through microscope only and both are imaginable to scientific logic. The unimaginable God is beyond space and has no spatial dimensions. Other than God, all the items in the creation including souls are imaginable because they have spatial dimensions. After all, the soul is nervous energy, which is in the form of propagating waves and it is only a specific special work form of inert energy generated from the inert energy in the functioning nervous system. It is just like the grinding work, which is a specific and special work form of current energy generated in working grinding machine.