προσοχή
Prosoche
Attention — the foundational skill
Prosoche is the foundational skill that makes everything else in the Philokalia possible. Before watchfulness, before stillness, before the Jesus Prayer — there is simple attention. The practice of deliberately directing your awareness to what is happening right now, right here, in your own inner life.
The distinction between prosoche and nepsis is subtle but important. Prosoche is the basic skill of paying attention — the capacity that gets trained every time you notice your mind has wandered and bring it back. Nepsis is the mature form of that attention — the sustained, directed, prayerful watchfulness that is able to discern between different types of thoughts and respond appropriately. Prosoche is learning to look. Nepsis is knowing what you're seeing.
The Philokalia's texts frequently use the Scriptural command "Be attentive to yourself" as the foundation for all inner work. The "secret thing" that could arise in your heart is the first appearance of an unhelpful thought — the provocation. Attention is what allows you to catch it at that earliest stage.
Prosoche is the most practically accessible teaching in the entire Philokalia. You don't need to understand any theology to practice it. You don't need to believe anything. You simply begin paying attention to what's happening inside you — the thoughts that arise, the emotions that pass through, the impulses that pull you. This basic attentiveness is the doorway into everything else the tradition teaches.