The length of life as we shall think of it here is not its duration or its longevity, but it is the push of a life forward to achieve its personal ends and ambitions. It is the inward concern for one's own welfare. The breadth of life is the outward concern for the welfare of others. The height of life is the upward reach for God. These are the three dimensions of life, and without the three being correlated, working harmoniously together, life is incomplete.
Life is something of a great triangle.
At one angle stands the individual person, at the other angle stand other persons, and at the top stands the Supreme, Infinite Person, God. These three must meet in every individual life if that life is to be complete. Because of his great purposefulness, we forget sometimes that the man was blessed with an incredible mind. He was never hesitant to say, be the best you can be. Dr. King took this great wisdom about the reality of life, and made it the first leg of the triangle of life, and with the power it gave him, turned everything he subsequently said and did, as near as possible, into one great act of Christian love.