Thinking in Chinese / Japanese...

理念/理唸 means idea, notion, concept, principle, theory, philosophy*, or doctrine in Chinese, Japanese Kanji, and old Korean Hanja.

This word is OK for a wall scroll, although it's more commonly used as an oral/informal word in Asia.

* This is not the title for philosophy but rather is about having a certain philosophy or approach to something.

意念/意唸 means idea or thought in Chinese.

意見 means idea, thought, opinion, or view in Japanese.

This word also has a similar meaning in Chinese, just often used in China.

念 is the simplest way to write “mindfulness” in Chinese, Japanese Kanji, and old Korean Hanja.

念 can be defined these ways: To read; to study (a degree course); to read aloud; to miss somebody (keeping them in your mind); idea; remembrance; sense; thought; feeling; desire; concern; attention; recollection; memory; to think on/about; reflect; repeat, intone; a moment.

Obviously, the context in which the character is used determines which definition or meaning is perceived. As a single character, it's open and perhaps ambiguous. Thus, it can be read with any or all of these meanings.

念 is used in a Buddhist context (often written as 正念 or “right mindfulness”) with similar meanings of thought and contemplation.

In Japanese, this character is sometimes used as the name “Nen.”

See Also:  Buddhism | Enlightenment

乗り換える is the Japanese way to say “move on.” This can also be translated as “to change one's mind,” “to change methods,” or “to change one's way of thinking.” For instance, if you changed your love interest or political ideology, you might describe the act of that change with this title.

Colloquially in Japan, this is also used to describe the act of transferring trains or changing from one bus or train to another.

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

This word is often used to describe the idea of opening the minds of the young or the new generation.

See Also:  Wisdom | Learning is Eternal | Learn From Wisdom

質多 is a Buddhist term that means “the heart considered as the seat of intellect” and “the thinking and reflecting mind.”

思想 means thought, thinking, or idea in Chinese, Japanese Kanji, and old Korean Hanja. Sometimes it can mean ideology, depending on context.

This can refer to someone's personality - like saying, “he is a thinker.”

Hishiryō (非思量) literally means not-thinking.

Hishiryo can be described as a state of mind beyond thinking and non-thinking during the practice of Zazen.

Shiryō (思量) means “thinking,” and hi (非) is a prefix for negation and opposition.

Therefore, hishiryo amounts to “unthink” or “not the matter of thinking.” The word hishiryo appears in Dogen Zenji’s Fukanzazengi, Shobogenzo Zazengi, Shobogenzo Zazenshin, and Keizan Zenji’s Zazen Yojinki. It is one of the most important words used to describe zazen. Hishiryo in these writings comes from a dialogue between Yakusan Igen (745-828) and an unnamed monk, which is described in Keitoku, Dentoroku, and other Zen texts.

The above is an abridged except from School of Shodo: Hishiryo
I suggest you visit that page for a full explanation.