'Grasp' in the Bible

but whoever blasphemes against the Holy Spirit and His power [by attributing the miracles done by Me to Satan] never has forgiveness, but is guilty of an everlasting sin [a sin which is unforgivable in this present age as well as in the age to come]”—

so that they will continually look but not see, and they will continually hear but not understand, otherwise they might turn [from their rejection of the truth] and be forgiven.”