Human beings are part of an ecosystem of organisms whose main impulse is to survive. Survival to what? To entropy, violence, cold, the void.
We are surrounded by an infinity of possibilities that can lead us to failure of survival. There are obstacles surrounding us in every direction. This is true for all the species inhabiting our planet.
Humanity is the most successful species on this planet. Part of the reason why is because our ancestors did not shy away from difficulties. Rather those obstacles were faced and overcome with much pain and sacrifice.