I pray that you, being rooted and established in love, may have power, together with all the Lord's holy people, to grasp how wide and long and high and deep is the love of Christ, and to know this love that surpasses knowledge - that you may be filled to the measure of all the fullness of God.
The late Christian singer Rich Mullins once sang about "the reckless, raging fury that they call the love of God." That's something of what the Apostle Paul is attempting to express in his prayer for the Ephesian church. The Father's love is boundless, unmerited, lavish, indiscriminate, inexpressible, incomprehensible, inexhaustible and unconditional. It became incarnate and made visible in Jesus.
1 John 4:16 tells us that "God is love." Therefore when God took on skin and entered our world in that Bethlehem manger, we can truly say that 'Love Came Down'. Love in it's purest, undiluted, perfect form was implanted in Mary's womb. Love beautifully expressed through service, compassion and healing walked through the dusty streets of first century Israel. Love most mercifully demonstrated through surrender, sacrifice and even death is seen when we look at a cross on a hill outside Jerusalem. In fact, this was a love even stronger than death.
That's the love that Paul is talking about. Not the fickle, tame, timid love we see around us in the media and popular culture. Real, authentic, active, demonstrable love. Paul longs that we would be 'rooted and established' in this love. 'Rooted' is an agricultural metaphor. A plant or tree is as strong as its roots are deep. The deeper you and I are rooted in the unfailing love of God, the less we sway when the winds of life beat against us. 'Established' is more of structural or construction term which again offers another picture of firm stability and hidden strength. God's love is the absolute foundation on which we build our lives, it is the immovable rock when everything else is uncertain, it is the unshakable source of life, hope and peace.
When 'Love Came Down' on that first Christmas, it changed everything. God's love went from being words written on a page to the Word appearing in human form.