"The trees of the Lord are full of sap."
Without sap the tree cannot flourish or even exist.
Vitality is essential to a Christian. There must be life--a
vital principle infused into us by God the Holy Ghost, or we
cannot be trees of the Lord. The mere name of being a Christian
is but a dead thing, we must be filled with the spirit of divine
life. This life is mysterious. We do not understand the
circulation of the sap, by what force it rises, and by what
power it descends again. So the life within us is a sacred
mystery. Regeneration is wrought by the Holy Ghost entering into
man and becoming man's life; and this divine life in a believer
afterwards feeds upon the flesh and blood of Christ and is thus
sustained by divine food, but whence it cometh and whither it
goeth who shall explain to us? What a secret thing the sap is!
The roots go searching through the soil with their little
spongioles, but we cannot see them suck out the various gases,
or transmute the mineral into the vegetable; this work is done
down in the dark. Our root is Christ Jesus, and our life is hid
in Him; this is the secret of the Lord. The radix of the
Christian life is as secret as the life itself. How permanently
active is the sap in the cedar! In the Christian the divine
life is always full of energy--not always in fruit-bearing, but
in inward operations. The believer's graces, are not every one
of them in constant motion? but his life never ceases to
palpitate within. He is not always working for God, but his
heart is always living upon Him. As the sap manifests itself in
producing the foliage and fruit of the tree, so with a truly
healthy Christian, his grace is externally manifested in his
walk and conversation. If you talk with him, he cannot help
speaking about Jesus. If you notice his actions you will see
that he has been with Jesus. He has so much sap within, that it
must fill his conduct and conversation with life.