_Answ._ Two ways: sometimes by experience, when the thing itself is actually given us; and always by the promise; when we ask for that which God commandeth us to ask, or promiseth to grant; for we are sure God's promises are all fulfilled. If we ask for the objects of sense (as food or raiment, or health, &c.) sense will tell us whether our prayers be granted in the same kind that we asked for; but if the questions be of the objects of faith, it is faith that must tell you that your prayers are granted; but yet faith and reason make use of evidences or signs. As if I pray for pardon of sin, and salvation, the promise assureth me, that this prayer is granted, if I be a penitent, believing, regenerate person, otherwise not; therefore faith only assureth me that such prayers are granted, supposing that I discern the evidence of my regeneration, repentance, and faith in Christ. So if the question be whether my prayer for others, or for temporal mercies, be answered in some other kind, and conduce to my good some other way, faith only must tell you this from the promise, by the help of evidences. There are millions of prayers that will all be found answered at death and judgment, which we knew not to be answered any way but by believing it.
_Quest._ XXX. What should a christian of weak parts do, that is dry and barren of matter, and can scarce tell what to say in prayer, but is ready to rise off his knees almost as soon as he hath begun?
[Sidenote: How to have constant supply of matter.]