On Sanctification

Is there another means by which man is sanctified apart from the Gospel? Can we "grow in the grace and knowledge of our Lord and Savior Jesus Christ" (2 Peter 3:18) by multiple means? By trying harder? By praying more regularly? More time in the Bible? Can there be a deeper dependence on Christ without a deeper understanding of His saving grace toward us?

On Christology

Can someone explain to me the concept of Jesus being both fully God and fully man at the same time? This is something that is hard for me to fully grasp with my mind.

For instance, when Jesus incarnated, how did that affect some of His attributes, like omnicience and omnipresence? I don't want to say that He temporarily gave them up, but how then can this God-man nature be characterized?

On Genealogy

I hold to a literal interpretation of the creation story in Genesis 1-2. One support I use for this position is that it seems to me that Jesus, Paul, John and Jude all referred to Adam and Eve or one of their children (Cain, Abel, Seth) in a manner that suggested that they were not figurative, but real people (Matthew 23:35, Luke 3:38, Luke 11:51, Romans 5:14, 1 Timothy 2:13-14, Hebrews 11:4, 12:24, 1 John 3:12, Jude 1:11, 14).

I recognize that there are challenges to address in holding this view. One that crossed my path recently was, "Who did Adam and Eve's children marry?" I would assume the answer would be, "each other". But, then, that leads to the question, "so when did it not become acceptable (spiritually, genetically, or both) for children to marry each other?"