Until God is pleased to pour out upon us the spirit of grace and of supplications, we cannot worship him aright; for God is a Spirit, and those who worship him must worship him in spirit and in truth; nor can we without this spirit offer up that spiritual sacrifice which is acceptable to him through Jesus Christ. When this spirit has been once given and kindled in a believer's breast, it never dies out. It is like the fire upon the brazen altar, which was first given by the Lord himself from heaven, and concerning which God gave this command: "The fire shall ever be burning upon the altar; it shall never go out" (Lev. 6:13). This fire might sink low; it might be covered with the ashes of sacrifice, but it never was suffered to go out for want of supply of fuel.
So at times it may seem to you as if there were scarcely any spirit of prayer alive in your bosom; and you may feel as destitute of a spirit of grace and of supplications as if you had never known its lively movements and actings. But you will find it drawn out from time to time by circumstances. You will be placed under peculiar trials, under which you will find no relief but at a throne of grace; or God will in tender mercy breathe again upon your soul with his own gracious Spirit, and by his quickening breath will revive, I will not say kindle, for it is not gone out, that holy fire which seemed to be buried under the ashes of corruption, that inward spirit of prayer which he gave you at regeneration, and which will never cease till it issue in everlasting praise.