Matthew Poole and continuators on 1 John 3:21

21 Beloved, if our heart condemn us not , then have we confidence towards God.

But for their not condemning us, tho the Expression be meerly negative, it must imply somewhat positive: For there are many whose Hearts condemn them not, through Ignorance of their Rule, or Oscitancy, Self-indulgency, or Neglect of themselves. But if after thorow search with Sincerity in the sight of God, our Hearts do not condemn, but acquit us as upright towards him, not willing to allow our selves in any ill Temper or Practice, (such as, for Instance, this of not loving or neglecting our Brother) then we have Confidence (Liberty of Speech the word literally signifies, which well suits with what follows) towards God; we have nothing to hinder or lie as a Bar against us in our recourse to him.