“Time takes no holiday.”
St. Augustine: Confessions
“He that striketh with the sword, shall be stricken with the scabbard.”
John Heywood: Proverbs
“No one respects a talent that is concealed.”
Erasmus: Adagia
“Superfluities do not hurt. (Superflua non nocent.)”
St. Augustine:  The City of God
“Torture us, rack us, condemn us, crush us; your cruelty only proves our innocence. That is why god suffers us to suffer all this.”
Tertullian: Apology 
“Take and read, take and read. (Tolle lege, tolle lege.)”
St. Augustine: Confessions (Words heard by him in the garden at the time of his conversion)
“Reason can but ascertain the profound difficulties of our condition, it cannot remove them.”
Card. Newman: Oxford University Sermons
“Reason in man is rather like God in the world.”
St. Thomas Aquinas:  Opusc
“The Catholic Church is the best defense against state absolutism just because it stands for the absolute; it is a defense against totalitarianism just because it is the only tolerable totalitarianism, that of the religion with its claims over all, and its power to regulate every instinct, inspire every ideal, and secure the highest happiness of mankind.”
W. E. Orchard: The necessity for the Church
“The sun is very beautiful, but is is too imbecile and weak to be a god.”
St. John Chrysostom: Homilies