Sanity; Senses: Become Conscious
気 is the modern version of 氣
"Don't spare your life for a worthy cause; yet, spare [value] your life."
[the calligrapher's art name]
[poem in hiragana that I cannot read]
不惜身命 is a Buddhist phrase; the kanji 不 is a prefix-negation, much like "un~" or "non~" in English. Here is another example I found; you might get a better understanding of "without X, do X"
It is said that using them as the emblem on a flag means 'fushakushinmyo' (to generously devote one's body and life to the Buddhist law).