Death is nothing but the taking off of one garb and giving it back to the plane from which it was borrowed, for the condition is this: one cannot take the garb of the lower plane to the higher plane. The soul is only released when it is willing -- or compelled -- to give its garb to the plane it has taken it from. It is this which releases the soul to go on in its travel. And as it proceeds to a higher plane, after its stay there it must again give its garb back and be purified from it in order to go further.