We travel in trains and cars
Stare up at the stars
Build rocket ships to Mars

But we can’t map the space between two hearts
Don’t know where that journey starts
Can’t build the vessel, don’t have the parts

Love rides in us, like a ship on the sea
It pushes us to go, and commands where to be
It connects earth and sky and you and me.

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A lot of our greatest achievements are motivated by love in one way or another. You do the work and make the journey (literal or metaphorical) hoping to find something better and very love-like at the other side of the effort (accolades, beauty, a sense of accomplishment, etc.)

In short, love is always trying to connect with itself. We are the means by which it makes the voyage.