"Higher consciousness" can sound like a vague new-age phrase — but it points at something psychologists have studied seriously for over a century.

William James's 1902 research into mystical experience was foundational; Abraham Maslow was the first major psychologist since James to seriously explore these heights of human consciousness, and his investigations confirmed James's earlier findings. Maslow deliberately "secularized" James's terminology, turning "mystical experience" into "peak experience" — a state marked by an expansion of self, a sense of unity, meaningfulness, and a transcending of ordinary ego concerns.

This guide grounds "higher consciousness" in that real research lineage, and covers what it actually describes.