Attention is the deliberate direction of citta — the capacity to sustain contact with a chosen object against the pull of distraction and novelty. The Sutras' eight-limbed path is, at its core, a systematic training of attention: from gross concentration (dhāraṇā) through absorption (dhyāna) to complete integration (samādhi). Modern cognitive science confirms what the tradition always understood: attention is trainable, and its training changes the structure of the mind itself.
Each step builds on the last.