Success is an equation between adapting yourself to the world and adapting the world to you, a sort of alignement between who we are, what we want to represent, and what the world needs.
Darwin taught us adaptation is the cornerstone of survival. Similarly, individuals striving in today's economy are those who can learn hard things fast: education is cultural evolution.
Knowledge is not just any power, it commands wealth: respect, fame, love, money... truth is both destructive and liberating. Those who are right, or appear to be right, hold the world. Scholars and priests are held in high regards because their spiritual or scientific knowledge contributes to society. The Oracle of Delphi was revered throughout Ancient Greece. Gods are represented as omniscient.
A humanistic education is meant to elevate humans, which is why it is encyclopedic. Rabelais emphasizes this need to open our minds to many topics when he describes Pantagruel's education to become a wise giant. Rabelais implies education is not about memorizing many things - "science without conscience is but the ruin of the soul" - but seeking a diversity of new experiences.
And experiences come in many shapes and forms. There is no unique path. All we can do is try and adapt. Maybe life is simply meant to try.