SO GOOD QUOTES

We should also withdraw a lot into ourselves; for associating with people unlike ourselves upsets a calm disposition, stirs up passions again, and aggravates any mental weakness which has not been completely cured.  However, the two things must be mingled and varied, solitude and joining a crowd: the one will make us long for people and the other for ourselves, and each will be a remedy for the other; solitude will cure our distaste for a crowd, and a crowd will cure our boredom with solitude.

The mind should not be kept continuously at the same pitch of concentration, but given amusing diversions.

—Seneca, On the Shortness of Life: Life Is Long if You Know How to Use It