While going through that on which faith is grounded, Reynolds lists the free love of God, the example of other sinners saved, and then the free offer. He writes:
Because there is a generality and unlimitedness in the invitation unto Christ, “Come unto me, all that are weary.– Let every one that will, come.” There is in Christ erected an office of salvation, a heavenly chancery of equity and mercy, not only to moderate the rigour, but to reverse and revoke the very acts of the law. Christ is ‘set forth,’ or proposed openly as a sanctuary and ensign for the nations to fly unto; and he hath sent his ambassadors abroad to warn, and to invite every man. As a fountain is open for any man to drink, and a school for any man to learn, and the gate fo a city for any man to enter, and a court of equity for any man to relieve himself;– so Christ is publicly and universally set forth as a general refuge from the wrath to come, upon no other condition than such a will as is not only desirous to enjoy his mercy, but to submit to his kingdom, and glorify the power of his spirit and grace in new obedience.
Life of Christ, pg. 454-455 in The Whole Works of the Edward Reynolds Vol. 1 (Soli Deo Gloria)
Reynolds goes on to add the priority of grace in the conversion of the sinner, as well as our duty to faith. These are the reasons we are to believe and the grounds upon which faith builds.