saṃskārakramo yujyate tasya vāyoḥ kramavṛttitvāt / tīvratā ca yujyate vegitvasampadā yuktatvāt / mandatāpi ca kṣayitvāt /
The sequence of modifications becomes explicable due to the sequential nature of that air; and intensity becomes explicable due to being connected with velocity; and weakness [becomes explicable] due to [its] waning nature.