Thus shall ye think of all this fleeting world: As star at dawn, a bubble in a stream A flash of lightning in a summer cloud A flickering lamp, a phantom, and a dream
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.
Believe nothing just because a so-called wise person said it. Believe nothing just because a belief is generally held. Believe nothing just because it is said in ancient books. Believe nothing just because it is said to be of divine origin. Believe nothing just because someone else believes it. Believe only what you yourself test and judge to be true.
For those struggling in midstream, in great fear of the flood, of growing old and of dying for all those I say, an island exists where there is no place for impediments, no place for clinging: the island of no going beyond. I call it nirvana, the complete destruction of old age and dying.
An unreflective mind is a poor roof. Passion, like the rain, floods the house. But if the roof is strong, there is shelter. Whoever follows impure thoughts Suffers in this world and the next. In both worlds he suffers And how greatly.
I, ever knowing the living beings Who tread the Path and those who do not In response to those who may be saved Preach to them a variety of dharmas, Each time having this thought: 'How may I cause the beings To contrive to enter the Unexcelled Path and quickly to perfect the Buddha-body?'