Decipher:
26 11 05 10 21 21 04 34 21 30 04 21 16 01 34 02 05 06 21 24 10 21 26 26 05 20 26 21 16 21 24 24 21 32 . 04 21 10 21 21 04 01 20 34 32 01 34 !
Then, please BRIEFLY TELL ME HOW YOU SOLVED IT!
Please DO NOT post your answer or hints here! Message your answer to Me!

Ook Well Since Nodody Answered My Riddle I Will Give You The Answer!

Hints:
1. Each number stands for a letter. The answer is 100% in English.
2. I'm testing your observation skills, too! ;)
SOLUTION :
If you've noticed that all the digits are 0 to 6 inclusive, you'll figure that the code is written on a base-7 numerical system. Here's what you'll get when you write the numbers in base 7, and each number corresponds to each letter's position in the alphabet:
01 = (0x7 + 1) = 01 = A
02 = 02 = B
03 = 03 = C
04 = 04 = D
05 = 05 = E
06 = 06 = F
07 = 10 = G
08 = 11 = H
09 = 12 = I
11 = 14 = K
12 = 15 = L
13 = 16 = M
14 = 20 = N
15 = 21 = O
18 = 24 = R
19 = 25 = S
20 = 26 = T
21 = 30 = U
23 = 32 = W
25 = 34 = Y
The answer is:
THE GOOD YOU DO MAY BE FORGOTTEN TOMORROW. DO GOOD ANYWAY!