"We need not doubt that the Evangelical movement had a powerf..." — Ronald Knox quote meaning

We need not doubt that the Evangelical movement had a powerful effect in waking up eighteenth-century England from its religious apathy, or that eighteenth-century England needed it. Where it failed was in its long-term effects. Religion became identified in the popular mind with a series of moods, in which the worshipper, disposed thereto by all the arts of the revivalist, relished the flavours of spiritual peace. You needed neither a theology nor a liturgy; you did not take the strain of intellectual inquiry, nor associate yourself whole-heartedly with any historic tradition of worship. You floated, safely enough, on the little raft of your own faith, eagerly throwing out the lifeline to such drowning neighbours as were ready to catch it; meanwhile the ship was foundering.