Our Father will cease to apply to us the value of his Son’s sacrifice if we display an unforgiving spirit. Jesus elaborated on this immediately after giving the model prayer.
(‏ مت ١٨ :‏ ٣٥‏ )‏ وَقَدْ تَطَرَّقَ يَسُوعُ إِلَى هٰذِهِ ٱلْفِكْرَةِ بَعْدَ ذِكْرِ ٱلصَّلَاةِ ٱلنَّمُوذَجِيَّةِ مُبَاشَرَةً .‏ ‏