Definition

Traditionally, many religions have regarded spirituality as an integral aspect of religious experience. Among other factors, declining membership of organized religions and the growth of secularism in the western world have given rise to a broader view of spirituality.The term "spiritual" is now frequently used in contexts in which the term "religious" was formerly employed; compare James' 1902 lectures on the "Varieties of Religious Experience".
Secular spirituality emphasizes humanistic ideas on qualities such as love, compassion, patience, tolerance, forgiveness, contentment, responsibility, harmony, and a concern for others, aspects of life and human experience which go beyond a purely materialist view of the world, without necessarily accepting belief in a supernatural reality or divine being. Spiritual practices such as mindfulness and meditation can be experienced as beneficial or even necessary for human fulfillment without any supernatural interpretation or explanation. Spirituality in this context may be a matter of nurturing thoughts, emotions, words and actions that are in harmony with a belief that everything in the universe is mutually dependent; this stance has much in common with some versions of Buddhist spirituality. A modern definition is as follows:

"Spirituality exists wherever we struggle with the issues of how our lives fit into the greater scheme of things. This is true when our questions never give way to specific answers or give rise to specific practices such as prayer or meditation. We encounter spiritual issues every time we wonder where the universe comes from, why we are here, or what happens when we die. We also become spiritual when we become moved by values such as beauty, love, or creativity that seem to reveal a meaning or power beyond our visible world. An idea or practice is "spiritual" when it reveals our personal desire to establish a felt-relationship with the deepest meanings or powers governing life."

The psychology of religion uses a variety of metrics to measure spirituality.