It is hard to know what other way men can come at truth, to lay hold of it, if they do not dig and search for it as for gold and hid treasure; but he that
does so must have much earth and rubbish before he gets the pure metal; sand, and pebbles, and dross usually lie blended with it, but the gold is nevertheless gold, and will enrich the man that employs his pains to seek and separate it.
English philosopher and physician (1632-1704)
John Locke (29 August 1632 – 28 October 1704) was an influential English philosopher and social contract theorist. He developed an alternative to the Hobbesian state of nature and asserted a government could be good only if it received the consent of the governed and protected the natural rights of life, liberty, and estate. If such a consent was not achieved, Locke argued in favour of a right of rebellion, which he referred to as an "appeal to heaven".
From: Wikiquote (CC BY-SA 4.0)
From Wikidata (CC0)
A young man before he leaves the shelter of his father's house, and the guard of a tutor, should be fortify'd with resolution, and made acquainted with men, to secure his virtues, lest he should be led into some ruinous course, or fatal precipice, before he is sufficiently acquainted with the dangers of conversation, and his steadiness enough not to yield to every temptation.
...when I had gone through the whole, and saw what a plain, simple, reason able thing Christianity was, suited to all conditions and capacities; and in the morality of it now, with divine authority, established into a legible law, so far surpassing all that philosophy and human reason had attained to, or could possibly make effectual to all degrees of man kind; I was flattered to think it might be of some use in the world; especially to those, who thought either that there was no need of revelation at all, or that the revelation of our Saviour required the belief of such articles for salvation, which the settled notions, and their way of reasoning in some, and want of understanding in others, made impossible to them. Upon these two topics the objections seemed to turn, which were with most assurance made by deists, against Christianity; but against Christianity misunderstood. It seemed to me, that there needed no more to show them the weakness of their exceptions, but to lay plainly before them the doctrine of our Saviour and his apostles, as delivered in the scriptures, and not as taught by the several sects of Christians.
Lastly, those are not at all to be tolerated who deny the being of a God. Promises, covenants, and oaths, which are the bonds of human society, can have no hold upon an atheist. The taking away of God, though but even in thought, dissolves all; besides also, those that by their atheism undermine and destroy all religion, can have no pretence of religion whereupon to challenge the privilege of a toleration. As for other practical opinions, though not absolutely free from all error, if they do not tend to establish domination over others, or civil impunity to the Church in which they are taught, there can be no reason why they should not be tolerated.
Now, I appeal to the consciences of those that persecute, torment, destroy, and kill other men upon pretence of religion, whether they do it out of friendship and kindness towards them or no? And I shall then indeed, and not until then, believe they do so, when I shall see those fiery zealots correcting, in the same manner, their friends and familiar acquaintance for the manifest sins they commit against the precepts of the Gospel; when I shall see them persecute with fire and sword the members of their own communion that are tainted with enormous vices and without amendment are in danger of eternal perdition; and when I shall see them thus express their love and desire of the salvation of their souls by the infliction of torments and exercise of all manner of cruelties. For if it be out of a principle of charity, as they pretend, and love to men's souls that they deprive them of their estates, maim them with corporal punishments, starve and torment them in noisome prisons, and in the end even take away their lives — I say, if all this be done merely to make men Christians and procure their salvation, why then do they suffer whoredom, fraud, malice, and such-like enormities, which… manifestly relish of heathenish corruption, to predominate so much and abound amongst their flocks and people?