Leonardo da Vinci's genius stemmed from his remarkable creativity, which distinguished him from individuals who are simply highly intelligent. While many may possess extraordinary intellect, it was Leonardo's ability to fuse imagination with intellect that set him apart. This blend allowed him not only to conceive unique ideas but also to explore and innovate in various fields, ranging from art to science.

In Walter Isaacson's book, "Leonardo da Vinci," this unique creative process is highlighted as Leonardo's defining trait. His extraordinary imagination enabled him to envision concepts that transcended traditional boundaries, thereby creating masterpieces and scientific advancements. It is this rare combination of creativity and intellect that continues to inspire and influence generations.