Bodhipakkhiya: Panca Indriya versus Panca Bala In the Bodhipakkhiya (the 37 factors of enlightenment) are mentioned the Panca Indriya and the Panca Bala. Both sets have the same factors: saddha; virya; sati; samadhi and panna. Why are those sets separately mentioned?
You use the faculty (Indriya) to exert the strength (Bala). Say you are a person generally strong in saddha you can use this fact to apply saddha for your spiritual development.