该句使用 'lies in' 结构表达“在于”，简洁有力地指出了幸福的来源，语法规范且意境深远。
Life is short, yet time is long. True happiness lies in living and being joyful.
Life is about cultivating a certain spirit and posture, seeking ease and pleasure. For people and things that cannot be changed, learn to compromise; when feeling tangled in pain, try to let go; for things that are hard to accept, learn to endure; for scenarios that are hard to imagine, try to understand. Only then can one find more moments of joy.
Even the most serene soul harbors desires; even the most open-minded heart may face desolation; even the most youthful face will eventually show the marks of time; even the clearest gaze can sometimes be lost in confusion.
Even the most profound love may end in heartbreak; even the most modest personality has its stubborn side; even the most beautiful life has moments of melancholy; even the most free-spirited life encounters disappointment.
Only by being willing to lower your head will you avoid bumping your head; only by enduring hardships will you find strength; only by striving hard will you achieve success; only by letting go will you find happiness.
Stand tall as a person, but bow low in your work. Be sincere with friends and devoted to your parents. Regarding the details of life, do your best and leave the rest to fate; as for the trivialities of daily living, simply let nature take its course.
生命短暂，岁月悠长，唯有活着且快乐，才是幸福的真谛。
人生讲究的是一种情怀与姿态，追求的是轻松与愉悦。对于无法改变的人和事，学会妥协；感到纠结痛苦时，试着释怀；看不惯的现象，学着忍耐；难以想象的情况，尝试去理解。唯有如此，心中才能多一份开怀。
再清静的心灵，也难免有欲望；再豁达的心胸，也会遭遇凄凉；再青春的容颜，终将显露沧桑；再纯澈的目光，有时也会迷茫。
再刻骨铭心的爱情，也会有情殇；再低调的性格，也会有倔强的一面；再美好的生活，也会有惆怅的时刻；再潇洒的人生，也会经历失望。
肯低头，才不会撞到头；肯承受，才能变得坚强；肯努力，才可能有所成就；肯放下，才可能获得快乐。
做人要抬头挺胸，做事要低头谦逊。对朋友以诚相待，对父母尽孝尽责。关于人生的细节，尽心随缘即可；至于生活的琐事，顺其自然便是。
"Happiness is essentially a state of mind."
"The key to happiness lies not in finding a perfect person"
"Happiness is held in your own hands; whether to give or not is decided by you."
"Happy people are those who also consider the needs of others."
"Happiness, however, is deeper and can become a holistic state of being."