To be always fortunate, and to pass through life with a soul that has never known sorrow, is to be ignorant of one half of nature.
Seneca the YoungerAlthough a man has so well purged his mind that nothing can trouble or deceive him any more, yet he reached his present innocence through sin.
Seneca the YoungerIf sensuality were happiness, beasts were happier than men; but human felicity is lodged in the soul, not in the flesh.
Seneca the YoungerThe mind is never right but when it is at peace within itself; the soul is in heaven even while it is in the flesh, if it be purged of its natural corruptions, and taken up with divine thoughts, and contemplations.
Seneca the YoungerAs gratitude is a necessary, and a glorious virtue, so also it is an obvious, a cheap, and an easy one; so obvious that wherever there is life there is a place for it; so cheap, that the covetous man may be gratified without expense, and so easy that the sluggard may be so likewise without labor.
Seneca the Younger