Often times, believers are deeply troubled by introspection.  Where are the peace and joy I am supposed to have?  If I really am a Christian, why do I often feel so troubled?  Then, they begin to judge their standing in Christ based on their subjective feelings.  Peace and joy are indeed fruits of salvation, but they must not be absolutely relied upon to guage our standing in Christ.  The objective reality is this:  at the cross, where I repented and believed, I was granted complete forgiveness of my sins and a guarantee of eternal life.  We must learn to get the promises of Scripture deeply ingrained in our minds and souls.  Then, when the enemy fires his fiery darts at us, we boldly declare the objective truths that God has graciously given us.  Consider these precious words from our friend, Charles Spurgeon:

“Understand that you must not look upon the possession of joy and peace as being the absolutely necessary consequence of your being saved. A man may be in the lifeboat, but that lifeboat may be so tossed about that he may still feel himself exceedingly ill, and think himself to be still in peril. It is not his sense of safety that makes him safe; he is safe because he is in the lifeboat, whether he is sensible of this or not. Understand then that joy and peace are not infallible or indispensable evidences of safety, and that they certainly are not unchanging evidences. The brightest Christians lose their joy, and some of those that stand well in the things of God, and concerning whom you would entertain no doubt, entertain a great many suspicions, however, about themselves. Joy and peace are the element of a Christian, but he is sometimes out of his element: joy and peace are his usual states, but there are times when, with fightings within and wars without, his joy departs, and his peace is broken. The leaves on the tree prove that the tree is alive, but the absence of leaves will not prove that the tree is dead.” Charles Spurgeon

Just how much is a soul worth? Consider these words from our Lord Jesus Christ:
Mark 8:36-38 For what will it profit a man if he gains the whole world, and loses his own soul? 37 Or what will a man give in exchange for his soul?

When we go about our business (work, grocery store, driving down the road), are we thinking about the many souls who are on the verge of being lost for eternity? Please, please do think, then act! They desperately need the gospel! Desperately! Desperately....

Mr. Spurgeon, have you any thing to say about this matter?

"If there existed only one man or woman who did not love the Savior, and if that person lived among the wilds of Siberia, and if it were necessary that all the millions of believers on the face of the earth should journey there, and every one of them plead with him to come to Jesus before he could be converted, it would be well worth all the zeal, labor, and expense. If we had to preach to thousands year after year, and never rescued but one soul, that one soul would be full reward for all our labor, for a soul is of countless price." Charles Spurgeon