Thou dost see the Trinity if thou seest love.
St Augustine of Hippo, De Trin. 8.8.12

“The love of husband and wife is the force that welds society together. Men will take up arms and even sacrifice their lives for the sake of this love. St. Paul would not speak so earnestly about this subject without serious reason; why else would he say, “Wives, be subject to your husbands, as to the Lord?” Because when harmony prevails, the children are raised well, the household is kept in order, and neighbors, friends, and relatives praise the result. Great benefits, both of families and states, are thus produced. When it is otherwise, however, everything is thrown into confusion and turned upside-down.”
St. John Chrysostom, Homily 20 on Ephesians

Have you an infant child? Do not let sin get any opportunity, but let him be sanctified from his childhood; from his very tenderest age let him be consecrated by the Spirit. Fearest thou the Seal on account of the weakness of nature? O what a small-souled mother, and of how little faith! Why, Anna even before Samuel was born promised him to God, and after his birth consecrated him at once, and brought him up in the priestly habit, not fearing anything in human nature, but trusting in God.
St Gregory of Nazianzus, Orat. 40.17