STARTDL TM - Quote in a Box

There is a quotation below that will fit the diagram. The letters in each column will go into the boxes immediately below but not necessarily in that order. A black box indicates the end of the word. What is the quote?

T L H E X P S C S A O I O F E T O O I

C H O S C I E I A G R O D I B N W K

T W A T E H I T T O E N D D

H I D N P P O N A

T T E O T E O H E I C H A T A O E E

P O H O B O T W K M H E T M H E L

Y H Y U H I N S T H S M A R T

U S K H T O K S

I H N D O Y I E R O L I F E Y

P E E S E C R S O S N T Y A O

N N R U U C U S W N L O S

T E Y O W