"...that you, being rooted and grounded in love, may have strength to comprehend with all the saints what is the breadth and length and height and depth, and to know the love of Christ that surpasses knowledge, that you may be filled with all the fullness of God..." (Eph 3.17-19)
I couldn't unfold the above passage better than Martyn LLoyd-Jones himself, so I'll hand over to the good "Doctor":
". . . The secret of the early Christians, the early Protestants, Puritans and Methodists was that they were taught about the love of Christ, and they became filled with a knowledge of it. Once a man has the love of Christ in his heart you need not train him to witness; he will do it. He will know the power, the constraint, the motive; everything is already there... The servants of God who have most adorned the life and the history of the Christian Church have always been men who have realized that this is the most important thing of all, and they have spent hours in prayer seeking His face and enjoying His love. The man who knows the love of Christ in his heart can do more in one hour than the busy type of man can do in a century...
...Are we seeking the Lord's face? Are we coveting the knowledge of His love? The Apostle prayed for every single member of the Church at Ephesus that he or she 'might be able to comprehend with all saints what is the length and breadth and depth and height, and to know the love of Christ, which passeth knowledge.' How tragic it is that any of us should be living as paupers, out on the cold street, while the banqueting chamber is open and the feast prepared..."
Where are you? Where am I? Out on the cold street or in the banqueting chamber? Press in, the feast is prepared!