"Let us note, from the first, that traditional Christianity i..." — Ronald Knox quote meaning

Let us note, from the first, that traditional Christianity is a balance of doctrines, and not merely of doctrines but of emphases. You must not exaggerate in either direction, or the balance is disturbed. An excellent thing to abandon yourself, without reserve, into God's hands; if your own rhetoric leads you into fantastic expressions of the idea, there is no great harm done. But, teach on principle that it is an infidelity to wonder whether you are saved or lost, and you have overweighted your whole devotional structure; you have ruled out a whole type of religious self-expression. Conversely, it is a holy thing to trust in the redeeming merits of Christ. But, put it about that such confidence is the indispensable sign of being in God's favour, that, unless and until he is experimentally aware of it, a This content downloaded from man is lost, and the balance has been disturbed at the opposite end; you have condemned one type of religious mind to despair.