 This notion of openness with those who are capable of it—that is, with those who possess the cognitive and affective properties required to participate in a personal relationship, which, in the case of God, would involve such things as a capacity to feel the presence of God, recognizing it as such; a capacity to exhibit attitudes of trust, gratitude, and obedience to God, and so on (2015b: 21n15)—is crucial. Schellenberg writes: