Francis Schaeffer on Assurance

"The Bible makes it plain that the man who is a Christian has a right to know that he is saved; it is one of the good gifts of God, to know truly that he is a Christian. This refers not only to the initial fact, after one has accepted Christ as Savior, but also applies in those great, crushing moments in our lives when the waves get so high that it seems, psychologically or spiritually, that we can never find our footing again. At such a moment, a Christian can have assurance. His salvation rests on the finished work of Christ, whether he accepts the peace he should have or not, and he can have assurance to the extent to which he believes the promises of God at that moment."

Francis Schaeffer

True Spirituality, 1971