For a good poet's made, as well as born.

Ben Jonson writing about his 'mentor' Shakespeare in the poem, TO THE MEMORY OF MY BELOVED MASTER WILLIAM SHAKESPEARE, AND WHAT HE HATH LEFT US.

Nature herself was proud of his designs,
And joyed to wear the dressing of his lines !
Which were so richly spun, and woven so fit,
As, since, she will vouchsafe no other wit.

...

For though the poet's matter nature be,
His art doth give the fashion : and, that he
Who casts to write a living line, must sweat,
(Such as thine are) and strike the second heat
Upon the Muses' anvil ; turn the same,
And himself with it, that he thinks to frame ;
Or for the laurel he may gain a scorn ;
For a good poet's made, as well as born.

They don't write eulogies this great any more! Read it in its entirety here.

I found it while reading Freeman Dyson's essay, This Side Idolatry, which is about his own mentor, the very unique and fascinating Richard Feynman. The essay was originally written as a foreword to the book, The Pleasure of Finding Things Out: The Best Short Works of Richard P. Feynman and is also included in The Scientist as Rebel.