Ez 11:19 "And I will give them singleness of heart and put a new spirit within them. I will take away their hearts of stone and give them tender hearts instead,"
The biggest key to "singleness of heart" is a new heart. One that is pliable and not rigid. One that listens and is willing to bend. It is a gift from God.
Father, we all need refreshment. We have grown tired and rigid. Please send a spirit of newness and conformity to You.