You have seen the great reservoirs provided by our water companies, in
which water for the supply of thousands of houses is kept. Now, the
heart is the reservoir of man, from which the streams of his life flow.
That life may flow through different pipes–the mouth, the hand, the
eye; but still all the issues of hand, of eye, of lip, derive their
source from the great fountain and central reservoir, the heart; and
hence there is no difficulty in showing the great necessity that exists
for keeping this reservoir in a proper state and condition, since
otherwise that which flows through the pipes must be tainted and
corrupt. Not only must the heart be kept pure, but it must also be kept
full . However pure the water may be in the central reservoir, it will
not be possible for us to have an abundant supply, unless the reservoir
itself be full. An empty fountain will most assuredly beget empty pipes;
let the machinery be never so accurate, let everything else be well
ordered, yet if that reservoir be dry, we may wait in vain for water.
See, then, the necessity of keeping the heart full; and let the
necessity make you ask this question: “But how can I keep my heart full?
How can my emotions be strong? How can I keep my desires burning and my zeal inflamed?” Christian! there is one text which will explain all
this: “All my springs are in Thee,” said David. If thou hast all thy
springs in God, thy heart will be full enough. If thou goest to the foot
of Calvary, there will thy heart be bathed in love and gratitude. If
thou art often in the vale of retirement, talking with thy God, thy
heart shall be full of calm resolve. If you goest with thy Master to the
hill of Olivet, with Him to weep over Jerusalem, then will thy heart be
full of love for never-dying souls. If thou art continually drawing
thine impulse, thy life, the whole of thy being from the Holy Spirit,
without whom thou canst do nothing, and if thou art living in close
communion with Christ, there will be no fear of thy having a dry heart.
He who lives without prayer–he who lives with little prayer–he who
seldom reads the Word–he who seldom looks up to heaven for a fresh
influence from on high–he will be the man whose heart will become dry
and barren; but he who calls in secret on his God–who spends much time
in holy retirement–who delights to meditate on the words of the Most
High–whose soul is given up to Christ–who delights in His fulness,
rejoices in his all-sufficiency, prays for his second coming, and
delights in the thought of his glorious advent–such a man must have an
overflowing heart; and as his heart is, such will his life be. It will
be a full life; it will be a life that will speak from the sepulchre,
and wake the echoes of the future. “Keep thine heart with all
diligence,” and entreat the Holy Spirit to keep it full; for otherwise,
the issues of thy life will be feeble, shallow, and superficial; and
thou mayest as well not have lived at all.
O for a heart thus full, and deep, and broad! Find the man that hath
such a heart, and he is the man from whom living waters shall flow, to
make the world glad with their refreshing streams.