There is nothing god cannot do.
There is no opinion so stupid that it can't be expressed by some philosopher.
He removes the greatest ornament of friendship who takes away from it respect.
The soul in sleep gives proof of its divine nature.
It is not enough to acquire wisdom, it is necessary to employ it.
I cannot find a faithful message-bearer," he wrote to his friend, the scholar Atticus. "How few are they who are able to carry a rather weighty letter without lightening it by reading.