Mystical experiences have always been approached with a hint of wonderment by both laypeople and scientists. Thanks to advances in neuroscience and psychology, their mechanisms are finally being researched with robust empirical tools. Scientific publications now offer more tangible definitions and descriptions of their unique features. They are characterized by an open-minded state, a sense of belonging to something more important than ourselves, a feeling of timelessness, happiness, gratitude and deep inner peace. They also appear to be an effective catalyst in the treatment of anxiety, depression and addictions. Therapeutic application of methods that induce mystical experiences is getting more popular, while scientific discoveries in this field are rapidly multiplying. However, many of us still do not know what mystical experiences are and thus remain unaware of what they have to offer to our mental health.