I believe we are all spirits in physical bodies and we continue in spiritual form after the death of the body.
1 Corinthians 15:44 It is sown a physical body, it is raised a spiritual body. If there is a physical body, there is also a spiritual body.
You can know this and it is still hard to say goodbye to someone and grief at a loss can stay with us for a lifetime, there’s no easy answers. Everyone deals with grief in their own way.
That’s my thoughts.