Such is the title of the English, Spanish, French and Italian book with 30-day program guidelines on how to entrust oneself to the merciful God through Mary. It is a translation of the book which was written on the basis of Scripture and the Diary of St. Faustina by Sr. Miriam Janiec from the Congregation of the Sisters of Our Lady of Mercy. Selected quotations are intended as prompts for personal prayer and meditation and that will lead the reader towards inner healing and freedom of heart, and thus to an attitude of trust in God and becoming more and more merciful like Him. In addition to the meditation prompts, the book also contains daily prayers of trust, inviting to entrusting oneself, day after day, as our human life goes on. The proposed spiritual path eventually leads us to complete entrustment of ourselves and our life into the hands of merciful Lord by making a solemn act of entrusting oneself to the merciful God through Mary.