This diploma thesis discusses the question of God's role in the life of children and adolescents. The first few years of a child's life are fundamental for understanding behavioural and thinking patterns of adults and spiritual or religious dimensions of individuals. The author of this paper presents different professionals’ views on psychophysical development of children and at the same time considers the role of the environment and society. The most important factor is the primary relationship with parents, who later in life become the embodiment for their notion of God. The second chapter details the theoretical approach regarding the stages of spiritual and religious development, including a notable contribution by Erik Erikson and James W. Fowler. They believe that psychosocial crises and challenges lead to religious growth. Such events mark crucial moments for one’s personality and should not be considered as something negative. Even though the two theoretical chapters of this diploma thesis consider faith as one’s relationship with God in general and surpass the limits of religious affiliation, the third part depicts God’s image through the empirical method of conversation, drawing and questionnaires as seen by children and adolescents who mostly come from catholic environment. Their notions are to some extent in accordance with the expert’s conclusions, but they do deviate in some respects, which is mostly due to environmental determinism. The conclusion therefore confirms the theories, however, incomplete answers leave room for further research on children who are currently or were growing up in an environment with more prominent differences between social classes, races, religions, family types and parent’s behaviour. With such research, it would be easier to confirm or deny different scientific beliefs, for example that children see God as something negative if their parents are aggressive.