Christ's first sermon: or, The absolute necessity of gospel duty and Christian repentance open'd and apply'd : Wherein is plainly discover'd what repentance is, and the great necessity theireof [sic] to salvation; with the great folly and desperate madness of those that delay and put off thier repentance unto a sick bed, or old age. Together with the great benefit, joy and comfort that shall be to the souls of those that timely and truly repent. By John Hart, DD.