Can we reach deep meditative states without teachers?

I read that the guidance of a teacher is "highly recommended because not all meditation experiences are spiritually skillful" and that > "It's also very common for solo practitioners to believe they have reached a deep meditative state when in fact they have barely scratched the surface. They may feel the rapture of the first dhyana, for example, and assume that's enlightenment. A good teacher will guide your meditative technique and keep you from sticking anywhere." > > [Developing Samadhi](https://www.learnreligions.com/samadhi-449923) Can we take a deep and authentic look, and potentially reach enlightenment without a teacher? thanks