T. S. Eliot:

Who is the third who walks always beside you?
When I count, there are only you and I together
But when I look ahead up the white road
There is always another one walking beside you
Gliding wrapt in a brown mantle, hooded
I do not know whether a man or a woman
—But who is that on the other side of you?

Thomas the Stern

Had a lot to learn
And more to teach,
But his grasp exceeded his reach.

T. S. Eliot:

"Swinburne mastered his technique, which is a great deal, but he did not master it to the extent of being able to take liberties with it, which is everything."