Based on the analysis of an extensive spectrum of literary works — which undoubtedly are documents of human life of the time — one can notice that friendship interests people across various ages and cultures. The didactic books of the Old Testament, representing the culture of ancient Israel, are among these testimonies. Especially the Book of Sirach contains a lot of thoughts on friendship. An important message of the biblical teaching regarding friendship is that the proper friendly relationship can exist only between people who have achieved God’s wisdom by fearing and loving God and who live according to the Law. Hence, the friendship in the horizontal dimension in the society of Israel had a specific reference to God. This kind of frie...