This is what has always been the signature of enlightenment, internal conversion, cognition as in new awareness of something one either half knew or was completely unaware of. It is the experience behind the classical descriptions of the conversion of Saul of Tarsus, the enlightenment of Gautama Buddha, the final realization of Aquinas etc. etc.
There is an experience behind the word and various dogmas of Grace/satori/samadhi and it is incredibly powerful, beneficial and personally/temporally undeniable no matter what your choice of faith or lack thereof.
To one who has faith, no explanation is necessary. To one without faith, no explanation is possible. Thomas Aquinas
The second sentence in that quote is instructive to most moderns and scientistic types who unfortunately have adopted a mentally bifurcated, conditioned, reductionistic and fragmentary stance. This so often stands in the way of cogniting on the fact that Faith as in a deep, undeniable and naturally integrative personal experience and a deep faith-in a particular religious perspective….are actually the very same experience.
Grace is the ultimate deep and integrative experience no matter what one’s perspective, beliefs or lack of beliefs. This is full philosophical exegesis, understanding and self knowledge.
Simply contemplate the active form of Love, i.e. Grace/graciousness in all of its aspects and you’ll never lose anything of actual value and have awakening, upon awakening.