No speed of wind or water rushing by
But you have a speed far greater. You can climb
Back up a stream of radiance to the sky,
And back through history up the stream of time.
And you were given this swiftness, not for haste
Nor chiefly that you may go where you will.
But in the rush of everything to waste,
That you may have the power of standing still—
Off any still or moving thing you say.
Two such as you with a master speed
Cannot be parted nor be swept away
From one another once you are agreed
That life is only life forevermore
Together wing to wing and oar to oar.

Robert Frost (1874-1963) American poet

“The Master Speed” (1934)
    (Source)

Collected in A Further Range (1937). Frost wrote the poem for his daughter's wedding, and the final line is the epitaph on his wife's portion of their gravestone.