There are three stages on the road to canonised sainthood in the Church:
At stage one the life of the person, his/her actions, writings, interactions are all scrutinised and assembled in a work called the “Positio Super Virtutibus” This “position paper” on the lived virtue of the Servant of God, tells of the life of the person and of how s/he lived Christian virtues to an heroic degree. Heroic virtue in the eyes of the Church has nothing to do with extraordinary signs like ecstasy or levitation etc. What is looked for is how the person responded to God’s will in his/her life according to whatever state of life they lived e.g. married, single, religious.
Catherine McAuley herself said;
“Since God’s power is not limited to time or space, we have the same means as the greatest saints had. God can effect in us what he accomplished in them. In fact to arrive at their sanctity requires no more than to simply perform our daily actions perseveringly and regularly for this is what constitutes a saint”.
Once a cause gets under way the person is called a ‘Servant of God’.
When the necessary scrutiny of the person’s life has taken place and it is accepted that the person did live Christian virtue to an heroic degree the Pope declares the Servant of God, Venerable. (Catherine McAuley was declared Venerable by Pope John Paul II, on April 9th 1990).
The next stage in the process is the declaration of the person as Blessed.
For beatification the Church requires one miracle. When a person is declared blessed s/he is proposed to the local church for veneration and imitation.
In the process of verifying that a miracle has occurred, through the intercession of a Servant of God, (for example Catherine McAuley), the Church follows a very specific and detailed process. It begins with the assurance that the case being studied meets a number of criteria.
The alleged cure must have two aspects:
The third stage is canonisation and another such miracle is required. For canonisation, the same exigent process takes place as happens for the process of beatification. The canonised saint is presented to the universal church for veneration and imitation.