avow one's principles
"This paper, my friend," said Faria, "I may now avow to you, since I have the proof of your fidelity--this paper is my treasure, of which, from this day forth, one-half belongs to you."
But this fear is counterbalanced by new realizations at work and with my friends, in which I am able to frankly avow that I have a disability.
On abandoning his grandfather's opinions for the opinions of his father, he had supposed himself fixed; he now suspected, with uneasiness, and without daring to avow it to himself, that he was not.
affirm or avow formally or solemnly.
avow one's belief, faith, conviction, etc