Grief alone can teach us what is man.
Labour is the purgatory of the erring.
In belief lies the secret of all valuable exertion.
The vices and the virtues are written in a language the world cannot construe; it reads them in a vile translation, and the translators are Failure and Success.
Kindness like light speaks in the air it gilds.
If you are in doubt whether to write a letter or not, don't. And the advice applies to many doubts in life besides that of letter writing.