The theme of amazement was actually discussed in my bible study class recently. Being amazed by something, being in "awe" of something, being awestruck.
There's two kinds of amazement we experience:
1. Amazement that causes excitement (perhaps a beautiful nature construct, a forest, a skyline, a animal, etc)
2. Amazement that causes fear (untamed nature, perhaps, that causes destruction, etc)
So, what are we really talking about? It's God. God is awe inspiring. God is amazing, God's wisdom is amazing, God's judgment is amazing, God's grace is amazing.
The answer is always going to be God. We should never lose that sense of wonder at the cross. That idea that familiarity breeds contempt is something we should always be on guard against. We must always approach Jesus with a new sense of wonder every day.