And indeed there will be time 
To wonder, “Do I dare?” and, “Do I dare?” 
Time to turn back and descend the stair, 
With a bald spot in the middle of my hair — 
(They will say: “How his hair is growing thin!”) 
My morning coat, my collar mounting firmly to the chin, 
My necktie rich and modest, but asserted by a simple pin — 
(They will say: “But how his arms and legs are thin!”) 
Do I dare 
Disturb the universe? 
In a minute there is time 
For decisions and revisions which a minute will reverse.

 

by T. S. Eliot