1 Corinthians 10:12

Let him that thinketh he standeth, either in a right and sound judgment and opinion of things, or in a state of favour with God, or confirmed in a holy course of life and conversation; standeth in grace, Romans 5:2. A man may stand in these things, and he may but think that he standeth: be it as it will, he is concerned to take heed lest he fall. He may but think he standeth, and if so, he will fall: he may really stand in a right judgment and opinion of things, and be a member of the church of Christ, and yet may fall into errors and some loose practices, so as to bring down Divine vengeance upon himself; he may have God's favour so far as concerns external privileges, and yet perish, as many of the Jews did in the instances before mentioned: nay, he may really stand in a state of justification and regeneration, and yet may fall, though not totally and finally, yet foully, so as to lose his peace, and bring God's severe judgments upon him. Therefore he that thinketh that he standeth, whether his apprehensions be false or true, had need use all means and caution that he may not fall, and that because, if he keepeth his standing, it must be by the use of due means, which God hath appointed in order to that end, though he be also kept by the power of God unto salvation, 1 Peter 1:5.