“If we are to control our own future, it will be necessary, not only to obtain the cooperation of people, but to prepare comprehensive plans for that future.”

Presidential campaign (April 12, 2015 – 2016), Speech in Orlando, Florida (September 21, 2016)
Context: When we leave people out or write them off, we not only shortchange them and their dreams, we shortchange our country and our own futures. That’s one reason why I care so much about supporting working parents. It’s one reason why I’m such a strong supporter of comprehensive immigration reform.... It’s also one reason why we’ve got to break down barriers of systemic racism, including under-investment that has held communities of color back for generations. That’s part of building an inclusive economy, too. And it’s why I believe we need to do more to help young people, who are left behind in the wake of the Great Recession, find those strategies and opportunities that will get them moving ahead again. And we’ve got to help older Americans who’ve displaced by automation and outsourcing in our changing economy.

Speech at Founding Rally of the Organization of Afro-American Unity (28 June 1964), as quoted in By Any Means Necessary (1970)
By any means necessary: speeches, interviews, and a letter (1970)
Variant: The future belongs to those who prepare for it today.
Source: Malcolm X, Black Liberation, and the Road to Workers' Power
Context: Education is an important element in the struggle for human rights. It is the means to help our children and our people rediscover their identity and thereby increase their self respect. Education is our passport to the future, for tomorrow belongs only to the people who prepare for it today.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 383.

Reported by I. U. Annenkov in an article entitled, "Remembrances of Lenin", Novyi Zhurnal/New Review (September 1961), p. 147.
Attributions

Making Plans For Nigel
Drums And Wires (1979)