βάκτρῳ δ' ἐρείδου περιφερῆ στίβον χθονός → support with a staff your steps that waver on the ground
subs.
Suitability: P. ἐπιτηδειότης, ἡ.
Quickness at learning: P. εὐμάθεια, ἡ.
