Bare a son - Not her firstborn; Aaron and Miriam were older than Moses. The object of the writer is simply to narrate the events which led to the Exodus, and he mentions nothing that had no direct bearing upon his purpose.
A goodly child - See the marginal references. Probably Jochebed did not call in a midwife Exodus 1:15, and she was of course cautious not to show herself to Egyptians. The hiding of the child is spoken of as an act of faith in Hebrews 11:23. It was done in the belief that God would watch over the child.