The concepts of yin and yang are embedded throughout this approach to mindfulness.
The wheel incorporates two aspects:
Internal (In) aspect — directs your attention inwards to the realm of emotions, thoughts and beliefs
External (Ex) aspect — directs your attention outwards to the realm of experiences, events and other people
Within the mindfulness wheel, there are 'being' and 'doing' aspects of each location or theme.
Being-focused (Be) themes draw attention to the current state of things, with a temporal focus on the present moment. They also involve consideration of the static or unchanging characteristics of our experience.
Doing-focused (Do) themes draw attention to changes over time, with a temporal focus which ranges from past through to future. They also focus on the dynamic or transient characteristics of our experience.
When using the wheel in your mindfulness practice, you can choose:
Location contemplation — maintain your attention on a particular theme (location) or combination of themes (relationships between locations)
Pathway contemplation — allow your attention to progress between themes by following certain pathways from a starting point to a finishing point
As well as the incorporation into the mindfulness wheel, it can be helpful (initially at least) to think about two different ways that you can approach mindfulness, associated with different purposes and intentions.
One way of characterising these approaches is receptive or active. This is somewhat similar to the difference between śamatha and vipassanā meditation, except the purpose of receptive mindfulness is not always to produce stillness and the purpose of active mindfulness is not always to transform perceptions.
Neither is right or wrong. Neither is better or worse. Each approach meets different needs.
Purpose: observing, recognising and accepting
Focus: what is (and what was)
Priority: the journey
Uses: senses + memory
The most extreme form of receptive mindfulness involves allowing your mind to wander without attempting to control or direct it, merely maintaining an awareness of the journey.
Purpose: envisioning, controlling and transforming
Focus: what could be (and what is not)
Priority: the destination
Uses: senses + imagination
The most extreme form of active mindfulness involves maintaining a particular ideal or desired state at the forefront of your mind, noticing and controlling any distractions or diversions.
Mindfulness is often portrayed as a way of generating stillness and peace, of quieting body, thoughts and emotions. But it can also be used to generate physical, emotional and mental energy. It may even do both at the same time. Some forms of physical meditative practice (e.g. tai chi or yoga) can have a calming effect on the mind and an energising effect on the body simultaneously.
Calming does not equate to receptive and energising does not equate to active. It is possible for receptive mindfulness to be energising (if greater attention leads to amplification of the experience of a particular state). Active mindfulness can be calming (if concentration on a particular state reduces peripheral distractions and distresses).
And, yes, in case you didn't notice it, there is an apparent contradiction between location contemplation being yin even though it may involve an active (yang) approach to mindfulness. Similarly, pathways contemplation (yang) is presented as using a receptive (yin) approach.
One important lesson of contemplating yin and yang is that what appears to be a contradiction is often a sign of a deeper truth. At a fundamental level, they are not really different but interacting and mutually generating aspects of the same whole.