Hay tan pocos éxitos …
Hay tan pocos éxitos fáciles como fracasos definitivos.
Hay tan pocos éxitos fáciles como fracasos definitivos.
El verdadero viaje del descubrimiento no consiste en ver nuevos paisajes, sino en verlos con ojos diferentes.
Todo progreso se debe a que la gente se atreve a ser diferente.
Sé pacífico; no vengarse puede ser también una forma de venganza.
Entre un hombre culto y un erudito hay la misma diferencia que entre un libro y un índice de materias.
Las puertas de la sabiduría nunca están cerradas.
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