Secular spirituality is following a spiritual philosophy without adherence to a traditional religion. Secular spirituality emphasizes the inner peace and personal growth of the individual, and the connectedness to others and to nature, rather than a relationship with the divine.
Spiritual intelligence is the capability to gain access to higher values, meanings, enduring purposes, and unconscious facets of oneself, and to use these insights to live a more creative, fulfilled, and richer life.
Spiritual growth, or development, is an inner process of removing obsolete habits and ideas, incorrect concepts and assumptions, and erroneous ideas and beliefs about life. Spiritual intelligence can help achieve this growth.