Replying to myself to collect some observations and responses.
- Someone noted downthread that meditation is dose-sensitive. This is is an incredibly useful observation. Most folks doing 30-60 mins of meditation a day are not at risk but doing an intensive weeks long retreat with 8-10hrs/day of cushion time is in a different risk bucket.
- Second, there were many objections to using meditation as a singular monolithic phenomenon vs. distinguishing between the varieties of meditative experiences. I have struggled with this in the past too. For the sake of this discussion let's define meditation as a purposeful focus on an object of meditation with the goal of single pointed absorption.
This definition is incomplete and inaccurate in measures. However I do think it encompasses a fair variety of meditative experiences. The object might be the breath, the flow of thoughts, mantras (prayer), visualizations or an analytical meditation. I include conscious breath work in this category - pranayama, wimhof - since you are consciously moving the breath/attention to create a heightened psychological state. Yogic/Vedic/Buddhist meditation practices - even Zazen - all ascribe to the state of one-pointed absorption, nay, union of the object and subject (shamatha/shiney).
- More importantly for us all meditations - Vipassana, Mantra-based and Yogic - can create breaks as evidenced by experiences related else where in the thread. For the sake of this discussion we can transcend the varieties and just lump them as meditation.
- Based on many conversations, I believe that meditation first amplifies the psychological makeup. If someone's mind has nervous tendencies or a tendency to mania then meditation will amplify it and bring it out. The analog of Crossfit and related intense regimens are useful here. Crossfit done without consideration for the body's deficiencies (e.g. lack of mobility in certain joints) - will lead to injury centered on the where the deficiencies lie. So if I have bad shoulder mobility, doing overhead cleans will probably cause a tear in my rotator cuff. Intense meditation has to be tailored to the individual and just like intense workout regimens, there has to be concurrent rehab of deficient areas. I unfortunately am not qualified to speak more about this.
- Benefits of Meditation: There is a notion that meditation is beneficial and can cure things that ail us. I think this is a very mistaken idea bought about by commercialization and packaging of meditation. I break down benefits from meditative practice especially retreat into the following components but would appreciate hearing more on this:
-- Greater focus. Focusing on the breath or another object greatly helps sharpen our ability to focus. This has obvious benefits in daily life rife with distractions. Greater focus also manifests as "mindfulness" or just awareness. A person who is mindful, as a result of meditation, is perceived in an interaction as present and focused. AFAIK, the world mindfulness does not occur anywhere in the Buddhist teachings and is a artefact of translation ;)
-- Dopamine fasting - Removing all stimuli for a few days in retreat and simple sustenance amplifies the senses and rewinds the hedonic adaptation treadmill. Upon exiting retreat, this leads to feelings of euphoria on encountering everyday stimuli like food or a cup of tea or a flower.
- Meditative absorption - Single pointed absorption in an object is a flow state and can be very pleasurable. Watching a sports event or a great movie is a flow experience where you forget the distinction between object and subject. Meditation makes this experience reachable on a daily/weekly basis to a accomplished meditator.
- Finally, behavior change from meditative realizations. This is function of the framework of meditation - Vipassana, Yogic, Mantra, etc. For example, if I can realize that my states of mind are transient by experience than perhaps I will be more detached from them which might give me a superpower of acting far more rationally in the face of my own fleeting passions.
In summary, meditation in an established tradition can be bring transformation, but approach it cautiously. A meditation retreat will not cure you and meditation is a journey like exercise and has to be repeated, ideally daily, to keep the benefits. The benefits might lie on the other side of a long journey.
Meditation in all traditions is a means to an end - the end being realization or one-pointedness. Meditation in the modern context is stripped from its goal and made an end in itself. Meditation on its own, sans realizations, will not heal or solve any of our problems but can offer transitory benefits.