Just as a mother would protect with her life her own son, her only son,
so one should cultivate an unbounded mind towards all beings, and loving-kindness towards all the world.
One should cultivate an unbounded mind, above and below and across, without obstruction, without enmity, without rivalry.
Standing, or going, or seated, or lying down, as long as one is free from drowsiness, one should practice this mindfulness.
This, they say, is the holy state here.

~Sutta Nipata

Solitude is happiness for one who is content, who has heard the Dhamma and clearly sees.
Non-affliction is happiness in the world - harmlessness towards all living beings.

~Udana 10

"The world may be chaotic around you; it may be full of fluctuations; it may be fearful; it may be full of pain; but the Yogi aims to be in peace even though circumstances are not."

~Gurani Anjali