Classicly

Zaidos had a lion’s heart and was absolutely ignorant of fear, but he worried when he thought of the possible effect on his father. He, poor man, would feel that his natural wish to behold his only son once more had placed the boy in a position of the gravest danger; indeed, in the path of almost certain death. What the effect of this knowledge would be on his health, Zaidos trembled to consider. But he was powerless to avoid the shock to his father, and once more shrugging his shoulders he stepped into line.