Stephen J. Costello is a prominent philosopher, depth psychologist, certified Enneagram coach, the author of sixteen books, and founder of the Viktor Frankl Institute of Ireland. He was educated at St. Gerard’s School, Castleknock College, University College Dublin, and Trinity College Dublin. He has over thirty years’ experience working in private clinical practice, as well as giving lectures, talks, and seminars in Ireland, the UK, the USA, Austria (Vienna), and Switzerland (the C.G. Jung Institute).