Chandas is grammar of a particular language.
Chandas of mantra-s will indicate how many bijaksharas there in that mantra and how these bijaksharas should be spelt/chant. That's why mantras should not be spelt/chant/practiced without any proper guidance. Mantras available in books and internet cannot disclose this important fact.
Place of this chandas is mukha (face) of the sadhaka.
Also Chandas is nothing but Goddess Saraswathi.
This is the reason a sadhaka who perform sadhana by knowing these facts and by practicing this nyasa their face will glow more. Anyone can find some aura around their face.
This can be experienced with any of a real sadhaka.
You are absolutely right.one need not talk just by seeing face we can identify the god or goddess they are close to.face is the index of sadhana .i read your posts in forum.you are true sadhaka.i have recently joined forum.i like Ravi guruji .he is more than sanyasi I can say avadhuta.he won this world.he doesn't fall for money .many sanyasis should learn from Ravi guruji.his ideals are inspiring.he does not sell srividya.it is divine.after seeing so much in life and in this world I lost interest in this world and became a srividya upasaka.am happy to see like minded people in this forum.