The article presents a practical guidance for catechists, preachers and pastoral workers and for their possible contact with Muslims in the Czech republic. This article presents a strong and joyful faith in the Christ in one hand and a desire of understanding between religions as a needed preconditions for the Interreligious Dialogue. The preacher has to be acquainted with the deep knowledge of Islam, its culture and the local muslim community. Also his rhetorical skills and a strong personality are strongly required. Further it shows the inspiration of proclamation of Christ which is based on similarities of the Bible and the Koran, and of the articles of faith and of the piety. At the end it is highly important to mention the knowledge of the classical Arabic literature and to search for elements of truth in it.