An Interior Locution is a private revelation heard or received internally, which we must verify before determining any recognition or significance.
The Catechism of the Catholic Church (CCC) explains:
Throughout the ages, there have been so-called “private” revelations, some of which have been recognized by the authority of the Church. They do not belong, however, to the deposit of faith. It is not their role to improve or complete Christ’s definitive Revelation, but to help live more fully by it in a certain period of history. Guided by the magisterium of the Church, the sensus fidelium knows how to discern and welcome in these revelations whatever constitutes an authentic call of Christ or his saints to the Church. Christian faith cannot accept “revelations” that claim to surpass or correct the Revelation of which Christ is the fulfillment, as is the case in certain non-Christian religions and also in certain recent sects which base themselves on such “revelations.” (CCC 67)
I had one locution from the Father, four from Christ, many from the Holy Spirit, and one from the Blessed Mother. The messages were short, clear, proactive and unequivocal.
The Holy Spirit asked me to write the Gospel Package in His last locution.
“Present the Gospel of Mark in segments for the people to enrich their knowledge about Christ in anticipation of the Illumination of Conscience.”