Nothing Nothingness in Chinese / Japanese...

空無 is “nothingness” in a Buddhist context.

The first character means empty but can also mean air or sky (air and sky have no form).

The second character means have not, no, none, not, or to lack.

Together these characters reinforce each other into a word that means “absolute nothingness.”

I know this is a term used in Buddhism, but I have not yet figured out the context in which it is used. I suppose it can be the fact that Buddhists believe that the world is a non-real illusion, or perhaps it's about visualizing yourself as “nothing” and therefore leaving behind your desire and worldliness.
Buddhist concepts and titles often have this element of ambiguity or, rather, “mystery.” Therefore, such ideas can have different meanings to different people, and that's okay. If you don't get it right in this lifetime, there will be plenty more lifetimes to master it (whatever “it” is, and if “it” really exists at all).

Soothill defines this as “Unreality, or immateriality, of things, which is defined as nothing existing of independent or self-contained nature.”

寧缺毋濫 is a Chinese proverb that can be translated as “Better to have nothing (than substandard choice).”

It basically suggests that one should prefer to go without something rather than accept a shoddy option.

See Also:  A Deliberate Inaction is Better Than a Blind Action

無所畏懼 means “fear nothing,” but it's the closest thing in Chinese to the phrase “fear no man” which many of you have requested.

This would also be the way to say “fear nobody” and can be translated simply as “undaunted.”

不經旅途不成目的 is the English proverb, “The destination is nothing without the journey,” translated into Chinese.

移山 is the Chinese, Japanese Kanji, and old Korean Hanja for “to remove mountains” or “to move a mountain.”

Figuratively, this means you can accomplish the impossible by sheer persistence.

移山 is the short form of a proverb about a man who had much persistence and could move a whole mountain (a bucket of soil at a time).

無 is the simple way to express “nothing.”

However, this single character leaves a bit of mystery as to what you might really mean if you hang it as a wall scroll. I'm not saying that's a bad thing; as you can decide what it means to you, and you won't be wrong if you stay within the general context.

More info: 無 is usually used as a suffix or prefix for Chinese and Japanese words (also old Korean). It can be compared to “un-” or “-less” in English. It can also mean “not to have,” no, none, not, “to lack,” or nothingness.

没有什么不可能 is a Chinese phrase that means “Nothing is impossible.”

何も不可能じゃない is a Japanese phrase that means “nothing is impossible.”

This is just one of a few ways to express this idea. This one is probably the most common but other valid versions include these:
何も不可能でない
何事も不可能ではない

Some shorter versions that just mean “not impossible” include these:
不不可能
不可能はない

Another common phrase that roughly means “No such thing as impossible” looks like this: 不可能なことはない

Some others include these...
Impossible things are possessed not by me: 無理なことなんてない
Where there's a will, there's a way: 精神一到何事か成らざらん

If you want any of these other versions for your wall scroll, just contact me and I'll set it up for you.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

虛空 means empty space, empty sky, or void.

In the Buddhist context, it can mean “emptiness of the material world.” This can also be used as an adjective to modify other words with a meaning of unreal or insubstantial.