“Those who know do not speak. Those who speak do not know.”
― Lao Tsu, Tao Teh Ching
Those who do not speak ought to (and warn or inform others.....)

Those who know do not speak and keep all the knowledge to themselves and that is NOT doing service to others, which is what we are all here for, apart from highering our frequencies.

We cannot do that by keeping silent or by not giving of ourselves to others.

I am spiritual and also have Buddhist friends.