Guardrail of Truth?

None need fear the consequences of such endeavours who have well learned the prime principle of sound philosophy, namely, not to allow the most plausible and pleasing conjectures to unsettle our convictions of truth, resting upon positive evidence. If there be any who frown upon all such attempts, they would do well to consider, that although individually, and from the constitution of their minds, they may find it very easy to abstain from every path of excursive meditation, it is not so with others who almost irresistibly are borne forward to the vast field of universal contemplation—a field from which the human mind is not to be barred, and which is better taken possession of by those who reverently bow to the authority of Christianity, than left open to impiety.