ISSI promotes the integral formation of the person, in accordance with the Christian vision of life. Within this framework, its spiritual orientation is entrusted to the Prelature of Opus Dei, an institution of the Catholic Church. (

For this purpose, a chapel is open to all those who wish to meditate during opening hours, with a chaplain who receives by appointment.

Female students, Catholic or not, can enroll in an optional course on faith (Creed, Commandments and Sacraments) as well as receive catechesis to receive the Sacraments.

Holy Mass is celebrated every morning at 7.20 am and other spiritual activities (recollections, retreats...) are organised throughout the year.