He refuses to let anyone know the fear of someone discovering that Pearl is his daughter. He generally tries to help her as much as he can without revealing himself. Dimmesdale attempts to protect Hester saying: "Truth in what Hester says, and in the feeling which inspires her! God gave her the child, and gave her, too, an instinctive knowledge of its nature and requirements,--both seemingly so peculiar,--which no other mortal being can possess. And, moreover, is there not a quality of awful sacredness in the relation between this mother and this child?" (Ch.8).
Dimmesdale uses this as his indiscreet way of looking out for both Hester and, more so, Pearl. But Dimmesdale keeps his discretion to protect himself from ridicule and judgement by his peers and colleagues in the congregation. Later in the book, he reveals to he has been living with the guilt and it has been destroying him. He also reveals that he believes Hester should no longer have to wear the infamous letter “A”, having learned from her heinous crime of adultery. Since Hester revealed that Chillingworth is infact her husband, Dimmesdale really shows us his cowardice towards the set revenge Chillingworth perform on