2 Though the positive Commandmen •, or (the positive p •rt of the Commandment) be of alike force and Authority with the negative, as to the obligation it layeth on us to duty, yet it doth not tie us to all occasions and times, as negatives do: Hence is that common Maxim, that affirmative Commands tie and oblige semper ever, that is, they never want their Authority, and we are never absolved from their obedience; but they do not oblige and tye ad semper, that is, in all differences of time we are not tied to the exercise of the duties enjoined; negatives again oblige both semper & ad semper, th •t is, always, and in all differences of time: For instance, in the third Commandment, the affirmative part is to use the Lords Name and Ordinances holily and reverently in prayer, r •ading and hearing, &c. So in the fourth Commandment we are r squired to sanctify the Sabbath, by waiting on Ordinances, &c. This makes these still duties, so as to pray, hear, &c. are still d •ties, but we are not to be, and should not be always exercised in these duties, for we must abound in other duty •s also of necessity, and mercy, we must eat, and sleep, &c. and when we sleep, we can neither act love, nor fear▪ Again, the negative ⟨p. 10⟩part is, not to profane the Lords Name in his Ordinances; this may not be done at any time: The reason of th • difference is this, bec •use in affi •mative • we are not always tied to the a ••s of Duties and Graces, but to the Disposition and H •bit. Habits are a Spiritual Quality, a (Vis) or Power •r fitting and enabling for bringing forth these acts, and for the bringing them forth in the due time and season, when they shall be called for; but in sinful things we are prohibited, not only the habits, but the acts also: the one is always and ever a sin, but the other is not always called for as duty. If any desire Rules to know when a duty is called for; as for instance, when we are to pray, hear, &c. it is hardly possible to be particular in this, yet we may try it by these Generals.