Solemnity of the Most Holy Trinity
From all eternity God has existed in a relationship of love - Father, Son, and Holy Spirit. These Three Persons of the Trinity are so united in love that they are actually 1 God. This is the amazing faith we proclaim every time we make the sign of the cross. And we have personally experienced this life of God: every single time we experience love, we taste for a moment the Trinity - for 'God is love' (1 John 4:8). That's what we look forward to in heaven. That's why, when we don't feel like we have anymore love, patience, kindness or compassion to give during the daily grind, we ask for strength from God - Father, Son and Holy Spirit. Then we start loving with Trinitarian love.