"Longa é a arte, tão breve a vida."
Antônio Carlos Jobim (1927 – 1994)
 "What gets us into trouble is not what we don’t know. It’s what we know for sure that just ain’t so."
Mark Twain (1835 – 1910)
 "Mudam-se os tempos, mudam-se as vontades."
Luís Vaz de Camões (1524 - 1580)
 "La inteligencia sin ambición es como un pájaro sin sus alas."
Salvador Dalí (1904 – 1989)
 "Du sublime au ridicule il n'y a qu'un pas."
Napoléon (1769 - 1821)
 "Cuando nuestras ideas chocan con la realidad, lo que tiene que ser revisado son las ideas."
Jorge Luis Borges (1899 - 1986)
 "Old people you should honour, young people you should teach."
German proverb
 "Everyone should sweep before his own door."
Dutch proverb
 "Doubt is the principle of wisdom."
Aristotle (384BC - 322BC)
 "We're not stupid! We're just poor! And we have a right to insist on this distinction."
Orhan Pamuk (1952 -)
 "Too little liberty brings stagnation, and too much brings chaos."
Bertrand Russell (1872 – 1970)
 "Inspiration is not the exclusive privilege of poets or artists."
Wisława Szymborska (1923 - 2012)
 "Nothing is stranger to man than his own image."
Karel Čapek (1890 - 1938)
 "Les plus grandes aventures sont intérieures."
Hergé (1907 - 1983)
 "Poca favilla gran fiamma seconda."
Dante Alighieri (1265 – 1321)
 "Pax et in terra fraternæ caritati."
Hymnus Pontificius
 "Death walks faster than the wind and never returns what he has taken."
Hans Christian Andersen (1805 - 1875)
 "Nothing on earth can make up for the loss of one who has loved you."
Selma Lagerlöf (1858 - 1940)
 "A narrow space looks wide to the narrow minded."
Moroccan proverb
 "Grands et petits les ont toujours respectées."
Hymne Monégasque
"Happiness happens by chance, and is not a law or the logical consequences of actions."
Elfriede Jelinek (1946 -)
"Un gran poder conlleva una gran responsabilidad."
Pablo Neruda (1904 - 1973)
"Don't add fuel to the fire."
Slovenian proverb
"Prejudice is a form of untruthfulness, and untruthfulness is an insidious form of injustice."
Miroslav Volf (1956 -)
"A house full of people is a house full of different points of view."
New Zealand proverb
"A masterpiece of a game can be ruined by insensitivity to the feelings of an adversary."
Yasunari Kawabata (1899 - 1972)
"Even if you know the way, ask one more time."
Korean proverb
"Atreverse es una virtud que pocos poseen."
Manuel Ortiz Guerrero (1897 - 1933)
"If you don't help yourself, even God cannot help you."
Bulgarian proverb
"El árbol más frondoso no siempre tiene la fruta más jugosa."
Proverbio panameño
"El error que otro cometa, no justifica el mío"
Proverbio uruguayo
"Ignoring isn't the same as ignorance, you have to work at it."
Margaret Atwood (1939 - )
"Sólo un idiota puede ser totalmente feliz." 
Mario Vargas Llosa (1936 - )
"Del dicho al hecho, hay un buen trecho."
Proverbio salvadoreño