“Pooh, how do you spell love?' 'You don't spell love Piglet, you feel it”
Variant: How do you spell love?
You don't spell it, you feel it.
Alan Alexander Milne was an English author, best known for his books about the teddy bear Winnie-the-Pooh and for various poems. Milne was a noted writer, primarily as a playwright, before the huge success of Pooh overshadowed all his previous work. Milne served in both World Wars, joining the British Army in World War I, and was a captain of the British Home Guard in World War II. Wikipedia

“Pooh, how do you spell love?' 'You don't spell love Piglet, you feel it”
Variant: How do you spell love?
You don't spell it, you feel it.
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“I'm not lost for I know where I am. But however, where I am may be lost.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“I wonder what Piglet is doing," thought Pooh.
"I wish I were there to be doing it, too.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“People say nothing is impossible, but I do nothing every day.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“Rivers know this: there is no hurry. We shall get there some day.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“Some people care too much. I think it's called love.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“What day is it?"
It's today," squeaked Piglet.
My favorite day," said Pooh.”
A.A. Milne book Winnie-the-Pooh
Variant: What day is it?", asked Winnie the Pooh
"It's today," squeaked Piglet
"My favorite day," said Pooh
Source: Winnie-the-Pooh
“How lucky am I to have something that makes saying goodbye so hard.”
Source: The Complete Tales of Winnie-the-Pooh
“You are stronger than you seem,
Braver than you believe,
and smarter than you think you are.”
A.A. Milne book Winnie-the-Pooh
Variant: You are braver than you believe,
Stronger than you seem,
And smarter than you think(:
Source: Winnie-the-Pooh
A.A. Milne book When We Were Very Young
When We Were Very Young (1924)
A.A. Milne book The House at Pooh Corner
The House at Pooh Corner (1928)
A.A. Milne book The House at Pooh Corner
Source: The House at Pooh Corner (1928), Chapter Six.
A.A. Milne book The House at Pooh Corner
Source: The House at Pooh Corner (1928), Chapter Seven.
Context: "Lucky we know the forest so well, or we might get lost," said Rabbit half an hour later, and he gave the careless laugh which you give when you know the Forest so well that you can't get lost.
Piglet sidled up to Pooh from behind.
"Pooh!" he whispered.
"Yes, Piglet?"
"Nothing," said Piglet, taking Pooh's paw. "I just wanted to be sure of you."
“Sometimes,' said Pooh, 'the smallest things take up the most room in your heart.”
Variant: Sometimes the smallest things take up the most room in our hearts.
“I used to believe in forever, but forever's too good to be true”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“Some people talk to animals. Not many listen though. That's the problem.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
A.A. Milne book Winnie-the-Pooh
Source: The House at Pooh Corner (1928), Chapter Six - "In which Pooh invents a new game and Eeyore joins in".
Source: Winnie-the-Pooh
“A bear, however hard he tries, grows tubby without exercise.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“Think it over, think it under.”
A.A. Milne book Winnie-the-Pooh
Variant: Think, think, think.
Source: Winnie-the-Pooh
“It's not much of a tail, but I'm sort of attached to it.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
“I did know once, only I've sort of forgotten.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
A.A. Milne book When We Were Very Young
Source: When We Were Very Young
War with Honour http://books.google.com/books?id=QmQDAAAAMAAJ&q="I+wrote+somewhere+once+that+the+third+rate+mind+was+only+happy+when+it+was+thinking+with+the+majority+the+second+rate+mind+was+only+happy+when+it+was+with+the+minority+and+a+first+rate+mind+was+only+happy+when+it+was+thinking", Macmillan War Pamphlets, Issue 2 (1940).
A.A. Milne book The House at Pooh Corner
Source: The House at Pooh Corner (1928), Chapter Seven.
“Pooh," said Rabbit kindly, "you haven't any brain."
"I know," said Pooh humbly.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh (1926), Chapter Six - Pooh.
“There must be somebody there, because somebody must have said "Nobody.”
A.A. Milne book Winnie-the-Pooh
Source: Winnie-the-Pooh