Who should we listen to? our mind or our heart?

you ought to use both feelings and logic.. but the proportion would vary for each situation

first mind then heart

If you want happiness and if you want peace, you must give love; only through love will you find inner peace. Therefore, develop your love, live in love. Love lives by giving and forgiving. The word of Sai is a stream of love that is flowing out to you. Love is controlled by heart only. You have to listen to heart in order to get independent success.

I don't think you listen to either, listen yo your inner voice and you will never go wrong.