If you're in space on the way to Mars, and a conflict develops... you can't turn around and go back, because Earth is already gone on its orbit.
Interpretation
Once a decision is made, especially in a significant journey, there is no going back; you must face the consequences.
This quote by Julie Payette emphasizes the importance of commitment and facing the consequences of our choices. Once we embark on a significant journey—whether literally to Mars or metaphorically in life—we cannot simply revert to our previous state; we must navigate through the challenges and conflicts that arise as we move forward.
In practice
In a speech about leadership, you might quote this to illustrate the importance of making decisions and sticking to them.
I'm 9, 10, and I'm watching the Apollo astronauts go to the moon. We're sitting on the floor of a school, and they have this... huge TV, and I'm looking at that, and I'm thinking 'Me, I would like to do that.' But it didn't dawn on me then that they were American; I was Canadian. They were men; I was a girl. They were test pilots, military folks.
One of the immutable patterns of history is the rise and fall of great powers. Those that survive are the ones that adapt as the world changes.
Today, our very survival depends on our ability to stay awake, to adjust to new ideas, to remain vigilant and to face the challenge of change.
As a black and as a woman, I didn't think that I would really want to live in any of the eras before this, because I would inevitably be worse off. I would have spent more time struggling just to prove I was human than doing my work.
The final hour of colonialism has struck, and millions of inhabitants of Africa, Asia and Latin America rise to meet a new life and demand their unrestricted right to self-determination.
When we confront facts and fears, we achieve real power and unleash our capacity for change.
I suppose we need not go mourning the buffaloes. In the nature of things, they had to give place to better cattle, though the change might have been made without barbarous wickedness.
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