With the Buddha

Physically: Siddhartha is still a young man, but he has grown more to an adult.
Mentally: He is looking for more in his life and is ready to see if the Buddha is that means to an end.
Spiritually: He is higher than ever, and has mastered many disciplines.
Socially: He has become well adept at doing things in a public setting, yet seems to be alone a lot.

"You are clever O Samana," said the Illustrious One, "you know to speak cleverly,my friend. Be on your guard against too much cleverness" Pg.35

In this quote the Buddha warns Siddhartha against being to clever. This warning wasn't heeded and he thought to much of how to become enlightened and forgot to listen and thats what ultimately would give him Nirvana.