He who is alone is happy. Do good to all, like everyone, but do not love anyone. It is a bondage, and bondage brings only misery. Live alone in your mind - that is happiness. To have nobody to care for and never minding who cares for one is the way to be free.
The happiest end of life is this: when the mind and the other senses being unimpaired, the same nature which put it together takes asunder her own work.
I find it easy to forgive the man who invented a devilish instrument like dynamite, but how can one ever forgive the diabolical mind that invented the Nobel Prize in Literature?
Beware of the anger of the body. Master the body. Let it serve truth. Beware of the anger of the mouth. Master your words. Let them serve truth. Beware of the anger of the mind. Master your thoughts. Let them serve truth.
There is nothing wrong with meditating just to meditate, in the same way that you listen to music just for the music. If you go to concerts to "get culture" or to improve your mind, you will sit there as deaf as a doorpost.