(another's) spirit; heart; will
Honorific term for someone else's inner thoughts, feelings, or intentions. Often used in respectful or formal contexts.
I act in consideration of my teacher's wishes.
God's heart; Lord's will
Christian term referring to the heart, spirit, or will of God. Used in religious contexts.
I live according to the Lord's will.
Honorific prefix 御 (み) + 心 (こころ, 'heart, mind'). The reading み is an older honorific prefix.