Is there no direct logical correlation between 'I am sure you will understand my writing to you once more about the important work of the American Cancer Society.' and 'I hope that I can convey the importance of the American Cancer Society but writing to you again.', indicating neutrality?
I am sure you will understand my writing to you once more about the important work of the American Cancer Society.###I hope that I can convey the importance of the American Cancer Society but writing to you again.