Job 39:14

There is, however, another property of the ostrich which distinguishes it from other birds, i.e., that she does not hatch her own eggs, but digs in the sand, deposits them there and covers them with sand, and so he says, "she leaves her eggs in …

Which leaveth her eggs in the earth. 14. For what is expressed by 'eggs,' but the still tender offspring, which must be long cherished, in order to be brought to a living bird? For eggs are, in truth, insensible in themselves, but yet when warmed are changed into living birds. And so, doubtless, it is certain, that young hearers and children remain cold and insensible, unless they are warmed by the earnest exhortation of their teacher.

When she leaveth her eggs in the earth, wilt thou perchance warm them in the dust? [MYSTICAL INTERPRETATION] 37. In 'eggs' there is one thing which is seen, another which is hoped for: and hope cannot be seen, as Paul witnesses, who says, What a man seeth, why doth he hope for? [Rom. 8, 24] What then is designated by the 'eggs' of the ostrich, but the Apostles born of the flesh of the synagogue? who whilst they present themselves as despised and lowly in the world, teach us to look for glory in heavenly places. For regarded by the haughty as abject, and as if of no account, they lay, like eggs on the ground; but the power of living, and of soaring to heavenly places, upborne by the wings of hope, lay hid within them. Which eggs the ostrich leaves in the earth; because the synagogue, scorning to listen to those Apostles, whom it had begotten in the flesh, gave them up to the Gentiles who were to be called. But the Lord with wonderful power warms these very same eggs in the dust; because He roused to life the progeny of the Apostles, in that Gentile world, which had hitherto been cast off; and they, whom the synagogue had despised as void of sense and life, now live and soar aloft, in the veneration of the Gentiles, by the authority of doctrine. The ostrich leaves her eggs in the dust; because the synagogue raised not from earthly desires those whom it begat by preaching. And because the ancient enemy finds those desires conceived in the heart, he doubtless hurries the minds assailed by them even into sins.

Which leaveth her eggs in the earth - This want of parental affection in the ostrich is almost universally acknowledged.

Which leaveth her eggs in the earth - That is, she does not build a nest, as most birds do, but deposits her eggs in the sand. The ostrich, Dr. Shaw remarks, lays usually from thirty to fifty eggs. The eggs are very large, some of them being above five inches in diameter, and weighing fifteen pounds - Goldsmith. “We are not to consider,” says Dr. Shaw, “this large collection of eggs as if they were all intended for a brood. They are the greatest part of them reserved for food, which the dam breaks, and disposeth of according to the number and cravings of her young ones.” The idea which seems to be conveyed in our common version is, that the ostrich deposits her eggs in the sand, and then leaves them, without further care, to be hatched by the heat of the sun. This idea is not, however, necessarily implied in the original, and is contrary to fact. The truth is, that the eggs are deposited with great care, and with so much attention to the manner in which they are placed, that a line drawn from those in the extremities would just touch the tops of the intermediate ones (see Damir, as quoted by Bochart, “Hieroz.” P. ii. Lib. ii. c. xvii. p. 253), and that they are hatched, as the eggs of other birds are, in a great measure by the heat imparted by the incubation of the parent bird. It is true that in the hot climates where these birds live, there is less necessity for constant incubation than in colder latitudes, and that the parent bird is more frequently absent; but she is accustomed regularly to return at night, and carefully broods over her eggs. See Le Valliant, “Travels in the Interior of Africa,” ii. 209, 305. […]