“Enduring patience — this is the substance of mindfulness.
If we don’t have enduring patience, mindfulness cannot arise. This enduring patience, this Dhamma of patience, is the substance of mindfulness. If someone trains and adapts themselves really in line with the Dhamma of patience, that’s called ‘having mindfulness and clear knowledge in the affairs of the heart’.
If this isn’t present?… woah! That’s trouble.”
– Luang Pu See Mahāvīro