To begin with, the Sons of God are immortal beings as long as their souls do not disperse. Additionally, their bodies are fundamentally ageless and deathless, and they do not naturally experience active death unless brought about by internal passive factors. Therefore, they lack the instinct to propagate the species like the Human Child.
Since there is no instinct for the prosperity of offspring, there is no need for the concepts of love and affection that are necessary for it. Therefore, in such aspects, they, the Sons of God, inevitably fall far behind the Human Children.
Still, it is not entirely impossible for them to exist. Therefore, it is possible to achieve a certain degree of understanding through learning. However, this does not mean that everyone will acquire the same level of understanding as the Human Children. Naturally, there are differences in understanding depending on the individual, and in some cases, it may be completely incomprehensible.