"Almost as soon as I entered the house I singled you out as the companion of my future life,"
"On that head, therefore, I shall uniformly silent; and you may assure yourself that no ungenerous reproach shall ever pass my lips when we are married,"
" 'You are too hasty, Sir... You forget I have made no answer... I am very sensible of the honour of your proposals, but it is impossible for me to do otherwise than decline them,' "
When Mr.Collins begins to propose to Elizabeth he tells her that she was the first of the girls to get his attention even though it was actually Jane.
"...it is usual with young ladies to reject the adresses of the man whom they secretly mean to accept... I am therfeore by no means discouraged by what you have just said, and shall hope to lead you to the altar ere long,"
"I do assure you that I am not one of those young ladies... who are so daring as to risk their happiness on the chance of being asked a second time. I am perfectly serious in my refusal.- You could not make me happy, and I am convinced I am the last woman in the world who could make you so,"
Lizzy politely declines Mr.Collins' proposal. She said she is honored by it but she cannot accept.
"... you should take into farther consideration that in spite of your manifold attractions, it is by no means certain that another offer of marriage may ever be made to you,"
"I thank you again and again for the honour you have done me in your proposals, but to accept them is abolutley impossible. My feelings in every aspect forbid it
Mr.Collins shows persistence by believing that if he continues asking Lizzy to marry him she will eventually say yes.
Lizzy shows her annoyance with Mr.Collins by saying when she says no she means no and isn't rejecting his proposal just to play hard to get.
Mr.Collins tries to manipulate Lizzy into marrying him by telling her this may be the first and last time she will ever be proposed to.