What's your opinion?

I ordered my college graduation announcements. I chose a quote by David Livingstone (two sentences long). I found out later that each sentence was spoken at two different times, and I had changed the tense of the message because I originally thought it was a typo.

So here is what I put on my announcements:

"I am prepared to go anywhere, provided it be forward.
I am determined never to stop until I have come to the
end and achieved my purpose". - David Livingstone

When it should have been:

"I am prepared to go anywhere, provided it be forward...I determined never to stop until I had come to the end and achieved my purpose". - David Livingstone

I don't want to discredit the man or what he said, but I like how I have it.

I have time to change that part, but I want to make sure I do it correctly.

What do you think? Thanks!
Belie, I agree with your comment on ellipses. I was thinking that too.