the awful and yet glorious sanctities of holiness and peace. Now our ordinary experience teaches us how much energy resides in a commanding hope. A big expectation is stored with wonderful dynamic, and it transmits its power to every faculty in the soul. The influence of a great hope fills the mind with an alert and sensitive trembling, inspiring every thought to rise as it were on tiptoe to await and greet the expected guest. A great hope pours its energy into the will, endowing it with the strength of marvellous patience and perseverance. I have lately read of an ingenious contrivance, which is now being used in some parts of Egypt, in which, by a subtle combination of glass receivers, the heat of the sun is collected, and the gathered energy concentrated and used in turning machinery in the varied ministries of agriculture. That is to say, the power of a diffused shining is directed to an engine and its strength enlisted in practical service. And so it is with the sunny light of a large hope. Its gathered energy is poured into the engine of the will, imparting glorious driving power, the power of "go" and laborious persistence. Every sphere of human interest provides examples of this principle. Turn to the realm of invention. An inventor has a great hope shining before him as a brilliant vision of possible achievement. With what energy of will it endows him, and with what tireless, sleepless, invincible patience! Think of the immeasurable endurance of the brothers Wright who were inspired by the great hope of achieving the conquest of the air! Their hope was indeed a helmet defending them against all withering suggestions of ease, protecting them against the call of an ignoble indolence which is so often heard in hours of defeat. An electric railway has just been introduced by its inventor to the British Government, which is capable of transmitting mails and parcels along a prepared track at the rate of three hundred miles per hour; and the inventor has recently quietly told us that he has been at work upon it for thirty years! But think how, all through those long and many fruitless years, his helmet of hope defended him, and especially protected him from those alluring suggestions which come from the mild climate of Lotus-Land, and which tempt a man to relax his tension and lie down in the pleasant and thymy banks of rest and ease. Or seek your examples in the realms of discovery. Read the chapters in Lord Lister's life which tell how he, braced and inspired by a mighty hope, laboured and laboured in the quest of an anæsthetic. Or turn to the equally fascinating pages which tell how Sir James Simpson toiled, and moiled, and dared, and suffered in the long researches which led to the discovery of chloroform. His will was rendered indomitable by the splendid hope of assuaging human pain.