110. When a loving person can do good for others, or sees that others are happy, they themselves live happily and in this way give glory to God, for “God loves a cheerful giver” (2 Cor 9:7). Our Lord especially appreciates those who find joy in the happiness of others. If we fail to learn how to rejoice in the well-being of others, and focus primarily on our own needs, we condemn ourselves to a joyless existence, for, as Jesus said, “it is more blessed to give than to receive” (Acts 20:35). The family must always be a place where, when something good happens to one of its members, they know that others will be there to celebrate it with them.
Paul had a finger on the pulse of his charismatic but troubled community at Corinth. This canticle on Christian love (1 Cor 13) was originally written not for families or spouses. But the application to our homes is appropriate. Spouses seem the natural target of joy. It is also important for parents to express this for their children, especially young children, trivial as their accomplishments might seem to adults.
For your reference, remember that Amoris Laetitia is online here.