thou didst keep me safe upon my mother’s breasts.
10 Upon thee was I cast from my birth,
and since my mother bore me thou hast been my God.
Messiah acknowledges that God was with Him from His birth. It was God who was the midwife or doctor.
He was provided a safe childhood. As a breast is the safest place a small child can be, this represents all the love a mother has for her children. The Hebrew word for breast is shad which is the root to the title El Shaddai.
He was cast upon God, like all the children of Israel. From Abraham to Messiah there had been an uninterrupted series of continual, sustaining, wonders and phenomena that had kept the line that was cast upon God, safe. On His eighth day, this covenant relationship was sealed with circumcision. His parents agreed that this one was under the covenant their father accepted 2500 years before. [Gen 17] For it was this covenant whose mark scared the very organ that normally delivers seed. This ancient ritual pointed to the fact that the promised child would not come by the normal sexual way.
Messiah reminds God that His dependance on God had been so from the beginning. His devotion was real.
“Go and proclaim in the hearing of Jerusalem, Thus says the LORD, I remember the devotion of your youth, your love as a bride, how you followed me in the wilderness, in a land not sown. Jer. 2:2
Yet for all this He was now abandoned.