Could one's own otherness lie in the domain of the unspeakable? Could this unspeakable be partly in the domain of spirituality and the sacred? How then can we give shape to this experience? Spirituality is studied here by the dimensions that characterizes it - in particular the sacred-, but it is never named to avoid confusion with the religious field or social thought. This article aims to present the scientific framework - in psychology - of the study of implicit spirituality and to analyze the "spiritual" experience of people, an experience that they do not name as such when they are questioned. To perceive the essence of the "sacred", to feel a connection with others and nature, to be in search of meaning, to experience a feeling of transcendence ... It is to develop or live an implicit spirituality and it is this awareness of a part of one's own Otherness that deserves a (re)discovery.