1v.209 "By what is the world tightly fettered?
What is its means of travelling about?
What is it that one must forsake
In order to say, ‘Nibbāna’?"

2v.210 "The world is tightly fettered by delight;
Thought is its means of travelling about.
Craving is what one must forsake
In order to say, ‘Nibbāna.’" [n.123] Spk glosses parajikaṇa in pāda b by padani, feet, explaining that the singular should be understood as a plural. In doctrinal contexts the cognate parajika means examination, and is regularly coupled with vitakka to describe the thought process, e.g., in the formula for the first jhāna. Here, however, the point seems to be that thought can travel over vast distances without physical locomotion.

1"Kiṁsu saṁyojano loko,
kiṁsu tassa vicāraṇaṁ;
Kissassu vippahānena,
nibbānaṁ iti vuccatī"ti.

2"Nandīsaṁyojano loko,
vitakkassa vicāraṇaṁ;
Taṇhāya vippahānena,
nibbānaṁ iti vuccatī"ti.