This quote suggests that the person speaking feels like there is an important element or activity missing from their life. It might mean that something is missing from the person’s daily routine, a type of relationship they have not had, or a place they have not visited. It could also mean that the person is missing out on something emotional or spiritual, such as a feeling of joy or satisfaction that they have not experienced. Whatever it is, the quote suggests that this person feels like they are not fully experiencing life in its entirety.