Afterwards

Troi: "You know, almost everyone has a moment in their lives when they exceed their own limits, achieve what seems to be impossible."
La Forge: "The tricky part is what happens afterwards."
Troi: "You almost always feel a sense of loss. But it is possible to carry something of that experience through the rest of your life, in ways that you aren't even aware of now."

- Star Trek: The Next Generation - 4x19 - The Nth Degree