All human unhappiness comes from not facing reality squarely, exactly as it is.

Unkind people spread malicious tales, and well-intentioned people also censure; but in either case the tranquil sage remains unconcerned. Nowhere is there to be found a disconcerted sage.

Peace comes from within. Do not seek it without. It can be argued that peace and happiness comes from the subjective internalised perspective of realizing things could be worse and being grateful they aren't. The alternative view that peace and happiness comes from the objective external perspective of having more and better things than at present, while important for growth, can be a never-ending source of jealousy, dissatisfaction and disappointment. A balance of the two, where people are grateful for what they have while striving for more seems the best blended perspective.

Through zeal, knowledge is gotten, through lack of zeal, knowledge is lost; let a man who knows this double path of gain and loss thus place himself that knowledge may grow.

It is good to have companions when occasion arises, and it is good to be contented with whatever comes.

Let a man overcome anger by love.

Beware of the anger of the mouth. Master your words. Let them serve truth.