My study has presented a vivid and detailed picture of Kepler's long journey toward the discovery of the laws of planetary motion, and I identify the various factors involved in this discovery and analyze how each factor contributed to final success. One of the most difficult tasks in this study is to locate and distinguish the religious, philosophical, and empirical ideas that shaped his thought and works. To my knowledge, such a study has been regrettably absent in Kepler scholarship, at least in the English language. Similarly, a detailed in-depth study of the various steps explaining how each of the different factors concurred to make the discovery possible also has not been attempted. Koyré and, before him, Small have discussed in great detail the various steps. But not only do they fail to identify all relevant major factors active in this process of discovery, but also the authors fail to discuss the interaction of those factors. My study aims at remedying these deficiencies, by presenting a considerably more adequate picture of Kepler's thought and work, as far as the discovery of the two laws is concerned.