I suspect that it was much the same for Jesus. He had to know that each person who would talk, see, or walk for the first time as a result of their interaction with him would naturally become evangelists on His behalf. It was only a matter of time before the secret would become known.
The secret was no longer that Jesus was the Son of God or that God had come to live among us. We uncovered this one weeks ago. The secret yet to be uncovered is that there was no room for Jesus to continue His ministry uninhibited by those who would be threatened by His miracles and would conspire to end this nuisance forever.
Perhaps Jesus wanted to spend time with his friends and family and lead a normal life as long as possible. Once the secret was out, his life would be anything but normal. It was only a matter of time before the echo of the ONE he called Father would would pierce through the chaos in the last sentence uttered by the god-man this side of the Great Story: It is finished.
For now, normal is good. And the innocence of speculation shelters the pain yet to come.