"If you want to build a ship, don't drum up the men to gather wood, divide the work and give orders. Instead, teach them to yearn for the vast and endless sea."
That's a lovely idea although I can't help noticing that I know of no shipbuilding companies based on the teaching of yearning while I do know of some that seem based on organising a workforce. I suspect that this is one of those ideas that while beautiful is far from being literally true.
How about "if you want your citizens to fund a space program, don't gather the workforce to build a spaceship but teach them to yearn for the vastness and potential of the void."