Burning fragrant substances such as agarbatti (incense sticks), camphor, loban, guggal, kasturi (musk), chandan (sandalwood) and shallaki (olibanum) is one of the sixteen ways of offering worship to a deity, known as shodshopchãr pujã. These substances possess certain properties which purify the air and induce good or positive vibrations in the brain. This helps a person concentrate more easily during meditation or a pujã ritual.
A philosophical moral of the burning incense stick is that, just as it burns away to ashes while simultaneously pervading the air with fragrance, an aspirant should
sacrifice his life to serve others and mould it such that
its fragrance inspires others.