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天意 is a way to express destiny in a slightly religious way.
天意 means “Heaven's Wish” or “Heaven's Desire,” with the idea of fate and destiny being derived as well. It suggests that your destiny comes from God / Heaven and that your path has already been chosen by a higher power.
My Japanese dictionary defines this word as “divine will” or “providence,” but it also holds the meaning of “the will of the emperor.” Therefore, I don't suggest this phrase if your audience is Japanese - it feels strange in Japanese anyway.