Whenever we do meditation, or chant mantras, it changes us in specific ways. If we practice meditation and chant mantras a few times, we receive wonderful benefit. But if we want to permanently change our habits, and thus ourselves, practicing meditation and chanting mantras every single day will help us do that.
Sadhana means Meditation. In these 40 Days we will understand and meditate upon the verses of Japji, given to us by Guru Nanak Dev ji. Reciting Japji Daily helps us attune our Soul to the universal consciousness. It changes our vibrational frequency and will also help us break any negative habits that block us from being our truest self.