The Psalter of Our Lord or Psalter of Jesus is a simple silent and contemplative prayer that is relatively new. Nevertheless this prayer is firmly rooted in the very old tradition of Christian prayer. About the silent prayer of St. St Teresa of Avila put it this way, "Silent prayer is the foundation of all forms of prayer." Meanwhile about the contemplative prayer of St. John of the Cross said, "Contemplative prayer is ...an affectionate gaze upon the mysteries of Christ." Thus the Psalter of Our Lord prayer are a simple prayer practiced in silence which we gaze lovingly at the mystery of Christ.

The Psalter of Our Lord began to be introduced to the public and at the same time practiced online through the YouTube channel "Crusader Network" around 2017. But in a limited way, this form of prayer has actually been known and practiced since the mid-1990s (more than 25 years ago) by a group of Catholic youths in Bandung, even though at that time the format was still very simple and did not yet use the name "Psalter of Our Lord" or "Psalter of Jesus."

Basically the Psalter of Our Lord is a simple prayer inspired by two Christian prayer traditions, namely the Jesus Prayer which comes from the Eastern Christian tradition and the Rosary which comes from the Western Christian tradition. The harmonious blend of elements originating from these two prayer traditions produces a new prayer that is completely different. In addition to absorbing the virtues of the Jesus Prayer and the Rosary, this simple prayer can also be a means to help build a spirit of Christian unity.

The aim of this book or video series is to briefly introduce the Psalter of Our Lord as a simple contemplative prayer which deeply rooted in the Christian prayer tradition. In the midst of an increasingly secularized world, many Christians are experiencing a spiritual dryness and are trying to reach for anything spiritual to fulfill their thirst. But it's a shame that many fall for fake spiritual movements that can harm faith such as the charismatic movement, the new-age movement, and also other forms of spiritual practice from pantheistic eastern religions. Therefore, the presence of a simple silent and contemplative prayer that is firmly rooted in Christian tradition and can build a solid Christian faith like the Psalter of Our Lord is really needed.

As Christians we also need to remember that since the Book of Genesis, God has put enmity between woman and her offspring against the snake and its offspring (Gen. 3:15). That is, until the end of time, we will always be in a spiritual war against the dark power and its followers. Consequently we need spiritual weapons. St. John Chrysostom said, "Prayer is a shield to the soul, a sacrifice to God, and a scourge for Satan," so it can be said that the spiritual weapon for Christians is prayer. Thus the Psalter of Our Lord prayer can also be a spiritual weapon for us in this spiritual war. Even later in this book or video series, it will become clear that this Psalter of Our Lord is a great spiritual weapon.

In addition, one of the biggest problems of Christianity is the division that has been going on for centuries. Currently, Christianity is divided into three major groups: Catholic, Orthodox, and Protestant, which unfortunately is still divided into tens of thousands of smaller denominations. How can Christ's teachings be the salt of the world when there are many different and contradictory Christian teachings? How can the Kingdom of God be manifested in the world if Christianity itself is so deeply divided?

The presence of the Psalter of Our Lord which is rooted in two different Christian traditions can be an alternative means of building a spirit of Christian unity. One of the reasons is because this prayer can basically be practiced by all Christians, regardless of their groups or denominations.

Based on the principle of "lex orandi lex credendi', which more or less means the way we pray reflects our faith, there is a close relationship between faith and how to pray. So by practicing the same prayer, in this case the Psalter of Our Lord, we can hope that one day Christians belonging to different denominations will be able to arrive at one and the same faith. Its potential as a spiritual mean for building Christian unity is one of the important characteristics of this Psalter of Our Lord or Psalter of Jesus.

Those are some of the benefits we can get from the Psalter of Our Lord prayer. Through this book or video series, it is hoped that more and more Christians will know what the Psalter of Our Lord prayer is, what spiritual riches it contains, and especially how to put it into practice.

Since this book or video series is only intended as a general introduction, the material of the Psalter of Our Lord is only briefly discussed. The goal is that people can easily understand this simple prayer in outline and can immediately benefit from it through practice. A more in-depth and richer explanation of the Psalter of Our Lord or Psalter of Jesus will be given at other time.