Nature and humanity are both undeniably beautiful 'independent' of God. However, they take on an increasinly more meaningful/full value when accompanied by their significance as gifts from God. The original topic of Children are perfect examples of this also... even if my newborn has kept me up well past my intended sleep time ha

Your second question is related to things often brought about by our free will to choose between good and evil. If God were to wipe away all sin, or to not allow the falling or pain of Man, it would be against the 'Order of Justice' or against this Free Will, 'Nature of Man'. God preserves the Order of Justice and Free Will by providing remedial salvation through the death of His incarnate Son. Pointedly: I don't deny the existence of my parents simply because they may choose to not protect me from every painful experience. God is still with Kirk's children, as He is with orphans and all others around the world, even if we have trouble noticing at times.

I believe being agnostic is a naturally temporary thing. It's a 'state' between belief and disbelief, that of indecision. Once contemplated honestly enough, you eventually realize you either do or do not have faith that there is a God.

I've obviously assumed you asked your questions out of genuine curiosity.

If you're looking for a contemplative read, I'd recommend diving into Saint Thomas Aquinas' writings. Specifically De Rationibus Fidei (chapters 5-7?) will expand on your second question. And if you like logic and reason (and have an absurd abundance of time), his Summa Contra Gentiles is well written and laid out... From what I've been able to get through.. I unfortunately don't find myself reading nearly as much as is required to have finished those yet.