The book shows that human intentionality according to Kazimierz Obuchowski outlines the challenges that correspond to the implementation of human needs and goods. The most important feature of human intentionality is acting in accordance with the human subjective standard, which includes the views of a man who sees himself as the source of his own behavior, his own goals as the object of his intentions, and the surrounding world as an opportunity to achieve his possibilities. One of the important activities based on a subjective standard is self-responsibility, the necessity to live his own life or the risk of taking responsibility for loss. All these actions result from the effort that can mark human life with different tensions and conflicts making life fuller.