Happiness never decreased by being shared.

You yourself must strive. The Buddhas only point the way.

Have compassion for all beings, rich and poor alike; each has their suffering. Some suffer too much, others too little.

He who, seeking his own happiness, punishes or kills beings who also long for happiness, will not find happiness after his death.

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.

Make of yourself a light.

'As I am, so are these. As are these, so am I.' Drawing the parallel to yourself, neither kill nor get others to kill.