every fiber of my being

Every fiber of my being is a phrase which is indicating that you feel or think a certain way with everything you have. It is usually in response to someone asking if what you say is true or if your feelings are genuine, such as With every fiber of my being which is telling them that you completely feel or think that way with everything you have. It is also used in reference to having love or strong feelings for someone; that you love them with every fiber of your being, or every part of you.