Here is an apparent contradiction which requires reflection. And the difficulty increases when we remember that most worthy works are the labour of years: an architect lays his plans for a great building which he can hardly hope to see finished in his own lifetime; an author spends days and months and years in the preparation of materials, and must depend on the uncertain future for a time to shape them into a book; a statesman, in proportion as he is wise, avoids what is called a hand-to-mouth policy, and lays his plans with his eye on distant possibilities, well knowing that his immediate actions are liable to misunderstanding, and may prove to be a complete failure unless the opportunity is accorded him of realizing his far-reaching schemes. And, in the same way, youth is spent in education which derives all its value from the expected years of manhood, and all the days of a good life are necessarily a preparation for that which is to come after: we must study in order that we may teach; we must train ourselves for duties which will come upon us, as we may reasonably suppose, in some distant future. Yet our to-morrow is unknown; we are not to boast ourselves of it; we cannot tell what a day may bring forth, and must therefore live only in to-day. Now the solution of this difficulty leads us to one of the profoundest of all spiritual truths. It is this: No life can be worth anything at all apart from the Eternal God, and faith in Him. Life cannot be really lived if it is merely "a measure of sliding sand" taken "from under the feet of the years." Our swift days cannot be effectually and wisely used unless we are linked with Him who embraces in Himself the past, the present, and the future. Our work, whatever it may be, cannot be rightly done unless we are, and know ourselves to be, in the great Taskmaster's sight. The proper use of each day can only be made if we are confident that our times are in His hands; only in this quiet assurance can we have composure and detachment of spirit enough to give our whole strength to the duty in hand. We must be sure that the Master-Artist knows the whole mosaic, and is ordering all the parts, before we can surrender ourselves to the task of putting to-day's piece into its place; we must have complete faith in the Architect who is designing the whole structure, before we can have our mind at leisure from itself to chip our block of stone or to carve our tiny gurgoyle. We can only live in the present, making the most of that which is really ours, on condition that we have God as our Future, relieving us of all anxious care, and assuring to us just strength for to-day. Thus our text has an implied contrast, which we may draw out in this way: "Boast not thyself of to-morrow, for thou knowest not what a day may bring forth;" but boast thyself in God all the day long,[676] for thou knowest that He will bring forth righteousness, wisdom, and love continually.