ADVICE - An opinion about what one should/should not do or how one should/should not act in a particular situation.

SUGGESTION - An idea, opinion or a possible plan or action for one to consider and think about.

"SUGGESTION" is the power here. That does not mean there will not be any advice. An advice will be given only as and when necessary. It is because:

"The highest function of the teacher consists not so much in imparting knowledge as in stimulating the pupil in its love and pursuit. To know how to suggest is the art of teaching" - Henri Frédéric Amiel