To your heart definitely. Because that's where all your true feelings, hopes and desires come from.
Do you think it is more important to listen to one's heart or mind?
I would say both. Heart and mind.
Beware of the Intentions of the Heart
“The heart is more treacherous than anything else and is desperate,” states the Bible. (Jer. 17:9) When our heartintensely desires something, do we not find reasons for carrying out its intentions?
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we should seek Jehovah’s help in prayer, remembering that “he is aware of the secrets of the heart.” (Ps. 44:21) God has also provided his Word, which can serve as a mirror for us. (Jas. 1:22-25)