‘If a truth which needs demonstration, and which is capable of demonstration, is barely announced, and not demonstrated, the mind feels a dissatisfaction, and does not rest short of the demonstration of which it feels the necessity. It is therefore of little use to dogmatize, when we ought to reason, demonstrate, and explain. In all cases of truths, not self-evident, or of truths needing proof, religious teachers should understand and comply with the logical conditions of knowledge and rational belief; they tempt God when they merely dogmatize, where they ought to reason, and explain, and prove, throwing the responsibility of producing conviction and faith upon the sovereignty of God. God convinces and produces faith, not by the overthrow of, but in accordance with, the fixed laws of mind. It is therefore absurd and ridiculous to dogmatize and assert, when explanation, illustration, and proof are possible, and demanded by the laws of the intellect. To do this, and then leave it with God to make the people understand and believe, may be at present convenient for us, but if it be not death to our auditors, no thanks are due to us. We are bound to inquire to what class a truth belongs, whether it be a truth which, from its nature and the laws of mind, needs to be illustrated, or proved. If it does, we have no right merely to assert it, when it has not been proved. Let us comply with the necessary conditions of a rational conviction, and then leave the event with God.’
source: Charles G. Finney, Lectures on Systematic Theology, p. 9.