How does the Englishman develop the theme that one can only realize one’s Personal Legend by overcoming challenges?

The Englishman recognizes that his meeting with Santiago is an omen.

When Santiago offers his help and knowledge, the Englishman is able to find the alchemist in the desert.

When the Englishman asks the alchemist how to turn lead into gold, the alchemist tells him that he must keep trying.

The Englishman encourages Santiago to speak with Fatima.