When Santiago meets The Alchemist, he wants to give up his journey and remain at the oasis. He believes he has already found his treasure. What does this treasure include according to Santiago?

Santiago believes that his treasure includes the knowledge and wisdom that he has gained in his journey of achieving his dream.He also believes that meeting and falling in love with a Fatima was also a part of his treasure.He was happy and satisfied that he had travelled and came to know "the soul of the world", which far more than any other shephard knew.