四海皆兄弟
Breadth that includes people
君子敬而无失，与人恭而有礼，四海之内皆兄弟也。
If a gentleman is careful and does not slip, and treats others with courtesy, then within the four seas all men are his brothers.
论语 · 颜渊篇
· our translation
The four seas are not geography but a way of saying "everywhere". Do it properly and there are no outsiders.
「四海」不是地理，是把范围放到最大的一种说法：做到了敬与恭，就没有「外人」。
有本者不竭
Full because it has a source
盈科而后进，放乎四海，有本者如是。
It fills every hollow before moving on, and reaches the four seas — that is what having a source looks like.
孟子 · 離婁下
· our translation
Water fills each hollow before it moves on, which is why it reaches the sea. Mencius uses it for having a source: only what is fed goes far.
水先把路上的坑洼注满再往前走，所以最后能到海。孟子用它讲「有本」——有源头的东西才走得远。
名声远播
A name that carries
名声若日，照四海只。
A name like the sun, lighting the four seas.
楚辞 · 大招
· our translation
From a summoning song: renown compared to the sun over the four seas. More concrete than "vast" — it means being known.
《大招》里的招魂辞，用「日照四海」形容名声之大。这一层比「辽阔」更具体：是被人知道。
海纳百川四海沧海海川海宁海清海岳望海
In a name
Capacity rather than drama: everything can come in, and it does not become agitated.
「海」给名字的是容量：什么都能进来，但自己不乱。