Constant, Always
Your soul is like the ground or the dawn. It is constant, never changing.
Think of some other things your soul is like, but always make sure you come back to one word: constant.
こう
つね, つねに
None
Also constant is the Emperor こういち, who will surely rule for a thousand more years!
A constant rule from Emperor こういち means constant kanji learning and constant WaniKani reviews. They will always be constant!