Surah 74. Al-Muddaththir, Ayah 56

Namely, unless He bestows His grace on them by making their minds and hearts receptive to the truth, so that they are compelled - from within themselves, as it were - to make the right choice. (See also note [11] on {81:28-29}, as well as note [4] on 14:4 .)

Righteousness as well as Forgiveness have their source in Allah's Will. Man's Righteousness has no meaning except in relation to the universal Will. For Taqwa see n. 26 to ii. 2. If we take the word here in the sense of "the fear of Allah", the translation would be: "He alone is worthy to be feared, and He alone is entitled to grant Forgiveness."