As I understand it, Jesus may've had two related reasons for not wishing to be identified as the Son of God right from the beginning of His ministry. The first could've been that in the society in which He lived, such an identification would've proved to be fatal without concrete, indisputable, evidence that He was a manifestation of God the Almighty.
The second reason for not being revealed overtly as God ties into the first and is concerned with the nature of salvation. Given that salvation hinges on one's faith in God and in His actions--such as, but not limited to, the resurrection of Jesus--and that faith is defined as belief in the absence of material, existential, proof/evidence, then the possibility of faith would've been eliminated had the truth of Jesus-is-God been made manifest and proof beyond the possibility of being doubted.
The reality of Jesus's miracles and the truth of His teaching can only require faith if Jesus is seen by the people as being from/of God but not as being God The Most High Himself. As long as Jesus performs miracles and presents teachings that are made possible by God, faith in God and in the actions and sayings of Jesus, the Face of God to the people of Earth (and to the entirety of Creation) remains possible, and to some, even self-evident (though I am not in the least of the opinion that that would be for the best).
Faith as belief in an intellectual vacuum is well suited to meditation but, only after one is satisfied with one's definition of "belief."