The basic law of conditionality - This-that Law Idhapaccayata. Dependent Origination - the First Six Links : ignorance, habits, consciousness, body and mind, and the six sense bases and contact
There are many meditation techniques, but fundamental is finding where the mind will settle - what citta finds comfort in. The more energy rests in that and returns to is, energy is consolidated instead of scattered, running out to external forms. This is the principle for clarification, purification, for awakening.
Continuation, Crossing the Threshold, or more commonly called Closing Talk of our retreat. Gathering our insights, transferring our practice, and going forth.