What is meant by the expression, "our mortal flesh?" It does not mean the carnal mind, but our earthly tabernacle; and the expression is similar to another in this chapter, "We have this treasure in earthen vessels, that the excellency of the power may be of God, and not of us."
It is, then, in this poor body, compassed with infirmities, that the life of Jesus is made manifest. This divine life will often spring up in fervent breathings after God, in the actings of living faith, in the sweet intercourse the people of God have with one another, in reading the Scriptures, in the application of precious promises, and under the preached word. From time to time it bubbles up like a spring from its source. Sometimes indeed it runs underground, buried as it were under the load of "our mortal flesh;" but again and again it reappears, drawn up by the Sun of righteousness. "Spring up, O well." But its risings are ever proportionate to its sinkings.
Thus in proportion as we cease to pray naturally, do we pray spiritually; as we cease to hope in the flesh, do we hope in the Lord; as we cease to believe with the head, do we believe with the heart; when we see an end of all perfection in self, then we begin to find perfection in Christ; and when we see nothing in our hearts but sin, misery, and wretchedness, then we begin to taste spiritual consolation. Thus in proportion as nature sinks, the life of Jesus rises, and is made manifest in our mortal flesh.
Is the soul, then, longing to have sweet manifestations of the life of Jesus? Where must it go to get them? What does the word of God say? "Whence cometh wisdom? and where is the place of understanding? Seeing it is hid from the eyes of all living, and kept close from the fowls of the air. Destruction and death say, 'We have heard the fame thereof with our ears" (Job 28:20-22). Till, then, we get to "destruction and death," the destruction of fleshly hopes and the death of creature religion, we do not so much as ever hear the fame of true wisdom with our ears.
Thus, when we get into darkness, then light springs up; when we get into despondency, hope arises; when we are tempted with unbelief and infidelity, faith appears. Thus those are the wisest in whom creature wisdom has most ceased; those are the strongest who have learned most experimentally their own weakness; those are the holiest who have known most of their own filthiness; those are the most religious in a true sense who have least religion of their own. So that just in proportion as we are delivered unto death, and execution takes place on what the creature loves, so does the life of Jesus begin to rise and make itself blessedly manifest.