“We’re proud of our progress, but we can’t take our foot off the gas.”

Twitter Post 2016 https://twitter.com/_bensontaylor/status/808033605469564929

The much less verbose true quote, from Begin's "acerbic" visit to the US Congress in 1982 (during the Lebanon War), as found in Time Magazine's contemporary report http://content.time.com/time/subscriber/article/0,33009,925497-6,00.html (George J. Church, July 05, 1982):
"Don't threaten us with cutting off aid to give up our principles!"
"Sir, do not threaten us with cutting aid. First of all, you should know that this is not a one-way street. You help us, and we are very grateful for your help; but this is a two-way street: We do a lot for you. And also in recent battles we did a lot for the United States; and I gave some examples, but this is not the place to go into them. Therefore, do not threaten us with cuts in aid, but take note: That if at any time you demand of us to yield on a principle in which we believe, while threatening to cut aid, we will not abandon the principle in which we believe - and propose cutting aid. The argument went approximately thus."
On the other hand, contemporary reports give the true quote as also being far less verbose.
Source: attributed as alleged reply to Senator Joe Biden in Ronn Torossian's op-ed "Menachem Begin To Joe Biden: I Am Not A Jew With Trembling Knees" https://www.jewishpress.com/indepth/opinions/menachem-begin-to-joe-biden-i-am-not-a-jew-with-trembling-knees/2015/04/03, in 2015 without source. Possibly of earlier origin.
Source: As found in Time Magazine's contemporary report http://content.time.com/time/subscriber/article/0,33009,925497-6,00.html

Knesset address (June 8, 1982) per 4 October 2004 article "Exposing False Zionist Quotes II" by Committee for Accuracy in Middle East Reporting in America http://www.camera.org/index.asp?x_context=7&x_issue=21&x_article=775

Context: As we commemorate independence, let us dedicate ourselves to provide a truly ethical, virtuous, wise and equitable service to all. Let us pledge to consolidate on peace and freedom achieved and builds this future for our land and people. On this day, as we celebrate the 68th anniversary of our Independence, we are proud of the progress made towards safeguarding the freedom, sovereignty, territorial integrity of the Nation and strengthening national reconciliation and economic and political rights of all our citizens. This occasion is of special significance because we commemorate the dawn of freedom, at a time coinciding with the taking of clear and resolute steps to firmly establish democracy and good governance, the Rule of Law, and a truly meaningful parliamentary system; to establish a long lasting and stable structure of good governance, in keeping with the mandate given by the people one year ago. We are resolved to continue on this path to create a socio political environment for all citizens to live securely without fear. After achieving these, we have commenced a new drive for development, of which much remains to be done. It is our belief that the strength of our freedom largely depends on developing indigenous skills and knowledge, while zealously guarding the rich cultural and social heritage of our past and move ahead to the victories of the future. As we celebrate the gaining of Independence, today, we recognize our bounden duty to given all honor and respect to the members of the Security Forces who made great sacrifices to protect our sovereignty and territorial integrity in the battle against terrorism. Our foreign policy of middle path, with a commitment to justice and humanity, has won us friends in the international community who are ready to help us in our march towards prosperity. As we commemorate independence, let us dedicate ourselves to provide a truly ethical, virtuous, wise and equitable service to all. Let us pledge to consolidate on peace and freedom achieved and build this future for our land and people

His Independence Day Message, quoted on Asian Tribute (February 4, 2016), "Let us pledge to consolidate on peace and freedom achieved and builds this future for our land and people – President Maithripala Srisena" http://www.asiantribune.com/node/88511

Act II, scene 2. Compare Thomas Middleton, A Mad World, My Masters, Act I, scene 3. Pliny, Natural History, Book VII, Chapter XVII. William Shakespeare, Much Ado About Nothing, Act III, scene 2.
The Honest Man's Fortune, (1613; published 1647)

A Mad World, my Masters (1605), Compare: "From the crown of his head to the sole of his foot, 1 he is all mirth", William Shakespeare, Much Ado about Nothing, Act iii. Sc. 2.

Source: https://www.youtube.com/watch?v=xiLR4sCgvnc
Context: But now, let’s give each other a chance.
It’s time to put away the harsh rhetoric.
To lower the temperature.
To see each other again.
To listen to each other again.
To make progress, we must stop treating our opponents as our enemy.
We are not enemies. We are Americans.

(Criticizing the government's policy of releasing persons sentenced for involvement in the 2000 coup).
2000