But Protestants also believe that lust or concupiscence in the regenerate, as including a remaining tendency towards what is sinful, and the first or earliest motions of this tendency in the heart, though not deliberately consented to and followed out, is itself truly and properly sinful.
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It is illicit, not only to give consent to evil, but also to have an inclination, or propensity to such consent: because all our powers ought to be carried toward the good.
The Apostle himself in Rom. 6 & 7 shows quite openly that concupiscence is sin properly so called: for not only does he often call it sin, but not good, evil, to be held in hatred, fighting against the law of God, to be crucified, mortified, and destroyed, and rendering that man miserable in whom it resides.
Whatever differs from the norm of the law is sin: but concupiscence in the regenerate differs from the norm of the law. Therefore.
Lust in the bud; that is, the first risings of lust, even before the consent of the will to them; the first openings of particular lusts, sometimes not regarded nor noticed, and so neither approved nor disapproved; and sometimes checked in their very rising, Rom. 7:15. But however it be, they are sins here forbidden, though the Papists will not allow them to be so