[4.] Fourthly, He hath a way to betray and circumvent us _by heightening our own jealousies and fears against him_; and here he outshoots us in our own bow, and by a kind of overdoing makes us undo our desired work. For where he observes us fearful and watchful against wandering, he doth alarm us the more: so that (1.) instead of looking to the present part of duty, we reflect upon what is past, and make inquiries whether we performed that aright, or whether we did not wander from the beginning. Thus our suspicions that we have miscarried bring us into a miscarriage: by this are we deceived, and put off from minding what we are doing at present. Or (2.) an eager desire to fix our thoughts on our present service doth amaze and astonish us into a stupid inactivity, or into a saying or doing we know not what; as ordinarily it happens to persons, that out of a great fearfulness to offend in the presence of some great personages, become unable to do anything right, or to behave themselves tolerably well; or as an oversteady and earnest fixing the eye weakens the sight, and renders the object less truly discernible to us. [5.] Fifthly, Sometimes _the exercise of fancy acting or working according to some mistake which we have entertained as to the manner of performance, doth so hold our thoughts doing, that we embrace a cloud or shadow when we should have looked after the substance_. I will give an instance of this in reference to prayer, which, I have observed, hath been a snare and mistake to some, and that is this: because in that duty the Scripture directs us to go to God, and to set him before us, therefore have they thought it necessary to frame an idea of God in their thoughts, as of a person present to whom they speak. Hence their thoughts are busied to conceive such a representation; and when the shadow of imagination vanisheth, their thoughts are again busied to inquire whether their hearts are upon God. Thus by playing with fancy, they are really less attentive upon their duty. [6.] Sixthly, Satan can lay _impressions of distraction upon men before they come to religious services_, which shall then work and shew their power to disturb and divide our hearts, which is by a strong prepossession of the heart with anything that we fear, or hope, or desire, or doth any way trouble us. These will stick to us, and keep us company in our duties, though we strive to keep them back. And this was the ground of the apostle’s advice to the unmarried persons, to continue in single life,—times of persecution and distress nearly approaching,—that they might ‘attend upon the Lord without distraction,’ 1 Cor. vii. 37; implying that the thoughtfulness and more than ordinary carefulness which would seize upon the minds of persons under such straits and hazards, would unavoidably follow them in their duties, and so distract them.