I'd say look at the teacher's students. Do you want to be like them? If you see a good and harmonious sangha, and if they're practicing well and are good people with good hearts, then you have a cause for trust.
Tenzin PalmoFrom the point of view of emptiness, there is neither being nor non-being, but we're not on the point of view of emptiness, we're on the point of view of our relative being.
Tenzin PalmoTo want not to want, you'll tie yourself in knots. So this is why the Tibetans always say, just relax the mind and open.
Tenzin Palmo