In view of the fact that Jesus began to speak of His coming sufferings towards the end of His life, we are often inclined to think that the final agonies constituted the whole of His sufferings. Yet His whole life was a life of suffering. It was the servant-life of the Lord of Hosts, the life of the Sinless One in daily association with sinners, the life of the Holy One in a sin-cursed world. The way of obedience was for Him at the same time a way of suffering. 
Louis Berkhof, Systematic Theology