There comes a moment when to believe is not enough,
When to go on merely feeling and thinking is inexcusable ...
There comes a moment when we must out and act.

For at the last
We must pass thought through matter, giving it flesh.
That is the act of creation, that only Life:
That is what the world means with its physical beauty,
And what our bodies mean, projected, solid ...
Passion has become lips and arms, and the billowing seas . .

Many scholars have died of this malady,
Many dreamers have rotted in cloistered safety,
Much of greatness has passed, still-born ...