Know the qualities in each one's heart and then serve him. But first, try to know your own heart. Only then can you understand the hearts of others. If you have that understanding, then whatever words you speak and whatever duty you perform will be true duty, God's everlasting duty. If you are in that state, the love you give to each one will be God's complete love. In every situation, perform your duty with this understanding.

My Love You, My Children: 101 Stories for Children of All Ages (1981)