One of the most significant changes that takes place in Andrew's character while he is working in Aberalaw is that he becomes more aware of the inertia he faces. In Blaenelly, Andrew recognized some of this resistance to his craft. In Aberalaw, he becomes more aware of the resistance to what he does. Andrew changes as he recognizes that the challenges he faces are more acute in Aberalaw. At the same time, some of the zeal that he originally entered the profession with has worn off. In its place is hurt. Andrew becomes marked by this hurt, an element that is a distinct change from the relatively innocent zeal of Blaenelly days.
In Aberalaw, Andrew finds that like Blaenelly, he is not immediately praised for his commitment and care to his craft. The difference is the level to which other members in the community will go to display their own power over him. Andrew changes in his recognizing the cost of this resistance. He becomes saddened over the humiliation that he and Christine experience. He cannot fathom the social marginalization he experiences simply for doing and believing in his job. The resistance to his research, endeavors that would improve the quality of life for the people in Aberalaw, leaves its mark on Andrew. This professional sense of disenchantment is met with the need to defend himself and thus defend the idealism that motivates and animates him. Such a condition causes a specific change in Andrew. The need to have to embrace a political angle to why he does what he does leaves its mark on him, something that ends up becoming defining when he and Christine move to London. In this manner, it becomes clear that Andrew's character experiences significant changes as a result of his professional experiences in Aberalaw.