Nevertheless it is pretended, that it is absolutely necessary to know these substances: but how prove the necessity of having a knowledge of that which is impossible to be known? We are then told that good sense and reason are sufficient to convince us of its existence: this is taking new ground, when the old has been found untenable: for we are also told that reason is a treacherous guide; one that frequently leads us astray; that in religious matters it ought not to prevail: at least then they ought to shew us the precise time when we must resume this reason. Shall we consult it again, when the question is, whether what they relate is probable; whether the discordant qualities which they unite are consistently combined; whether their own arguments have all that solidity which they would themselves wish them to possess? But we have strangely mistaken them if they are willing that we should recur to it upon these points; they will instead, insist we ought blindly to be directed by that which they vouchsafe to inform us; that the most certain road to happiness is to submit in all things to that which they have thought proper to decide on the nature of things, of which they avow their own ignorance, when they assert them to be beyond the reach of mortals. Thus it would appear that when we should consent to accredit these mysteries, it would never arise of our own knowledge; seeing this can no otherwise obtain but by the effect of demonstrable evidence; it would never arise from any intimate conviction of our minds; but it would be entirely on the word of the theologian himself, that we should ground our faith; that we should yield our belief. If these things are to the human species what colours are to the man born blind, they have at least no existence with relation to ourselves. It will avail the blind man nothing to tell him these colours have no less existence, because he cannot see them. But what shall we say of that portrait whose colours the blind man attempts to explain, whose features he is willing we should receive upon his authority, whose proportions are to be taken from his description, merely because we know he cannot behold them?