Complex sentence: She valued his openness, and his genuine uncertainty regarding the existence and nature of God, which gradually developed into agnosticism, may have been a bond between them, without necessarily resolving the tensions between their views.
Split into simpler sentences: She valued his openness, and his genuine uncertainty regarding the existence and nature of God, which gradually developed into agnosticism. This may have been a bond between them, without necessarily resolving the tensions between their views.