In grammar school we are taught that we have 5 physical senses: vision, hearing, taste, touch, smell. But our reality is that we have more than 5.
Equilibrioception is our sense of balance, especially the orientation of our head in the Vestibular. This also allows us to perceive the effects of gravity, movement and balance, like feeling whether your are lying down or standing up.
Thermoception is a common sense we experience all the time but don't give a name is our ability to feel heat or it's absence, especially temperature changes.
Proprioception is the sense of movement and orientation and position of our limbs and muscles.
Electroreception is our basic ability to sense electrostatic charges and natural electrical stimuli.
Tension can be sensed in parts of our bodies like muscles and allow the brain the ability to monitor muscle tightness.
Nociception is our sense of damage or potential damage in our body; so basically pain.
Then there are interesting combinations of the senses, where the parts of our sense organs and nerves can work together so that the mind can perceive more detail about our environment.
Then, we have our mental and social senses.
An important one is the sense of meaning. It's a form of mental vision.
What you are familiar with and what you don't know.
Our minds seek to have one foot in the familiar and one foot in the unknown. That's where we experience growth. (Stress + Rest = Growth) Grounded by what we know, and experiencing manageable stress from encountering the unfamiliar, yields mental growth.
When our sense of meaning is stimulated, we are in the right place and at the right time, and it feels like everything lines up. Many parts of your mind tell you that "I'm where I should be." It is a physiological and psychological sense, felt in the body, and the parts of the mind respond. The parts of the mind that nag and distract you are quieted.
The purpose of profound contemplation, whether religious or philosophical, is to develop this sense.
Notice when that happens, maybe that only happens rarely for you. When it does, create a log. For many people this is one of the purposes that their diary serves.
What was I doing? What was happening around me? What is on my mind? Can I arrange to experience those conditions more often?
Like all of our other senses, we have to balance and manage this sense. We can't just use vision all the time and ignore our hearing. To be fully human we use all of them at different times.