Some choice counsel from Thomas Chalmers to a Christian lady struggling with doubts (1826). His distinction between having a concern about what and not how to believe is especially choice.
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But, generally, you complain that you are ignorant of how to go—how to believe. Now this has long been a stumbling-block to many; their thoughts are how they are to believe, when their thoughts should be what they should believe. They look inwardly for the work of faith, when they should look outwardly for the object of faith. “For every one thought,” says Richard Baxter, “that he casts downwardly upon himself, he should cast ten upwardly and outwardly upon Jesus, and upon the glorious truths of the Gospel.” You say that you have no doubts of the freeness of Christ’s salvation, and of His willingness to save you. Dwell upon this; persist in this; stand in the Gospel attitude of looking upon Jesus, and light will at length arise within you. In the act of looking, you may have to wait a longer or a shorter time for your coming enlargement; but surely it is worth the waiting for. Meanwhile your business is prayer; a diligent attention in the ordinances of religion; reading of God’s word; and, above all, a keeping of the sayings of Christ: “He that keepeth my sayings, to him will I manifest myself.” Be assured you are in good hands, even in the hands of Him who will not break the bruised reed nor quench the smoking flax.
that there will be no such interruptions in the Millennium; there are none such in a Moravian village at this moment; and there would be much fewer than there are in Glasgow had we a more extensive Christian community. The direct road to this is just to make as many Christian individuals and Christian families as we can; and in the exact proportion of our success shall we be rewarded by a freedom from all these temptations which the deadening and secularizing influence of the great majority of companies brings along with it. Let us ever keep by this object, then, as our great aim and purpose of our lives here below, combining, at the same time, all that discretion and skill which are necessary in the important work. Let us pray for that most desirable wisdom, the wisdom of winning souls—not forgetting that He who says, Keep thyself pure, also says, Lay hands on no man suddenly; and taking care, at the same time, never to convert the latter direction into a shelter for cowardice, or a plea for denying Christ before men. Oh, my dear sir, you are right to feel your shortcomings, and it is at the same time right to strike the high aim of being perfect, even as God is perfect. It is only wrong to conceive such a purpose in a dependence on ourselves; but who shall limit the power of His Spirit?”
West Port Experiment 