There always seems to be an unstated question (or often actually stated) in regards to reading the Bible, especially the Old Testament, and looking at the world today. This question is, why doesn't God bring down a pillar of fire for all to see like He did for Elijah? Why doesn't God send plagues of grand proportion to nations that displease Him as He did with Egypt? Why does God not act in such visible ways as to inspire His followers into acts of admirable courage and devotion?
The Way it Used to Be
There is a bit of mistake in thinking that God acted constantly and always visibly "back then." In fact, most of the big miracles God performs are separated by hundreds of years. A worldwide flood, splitting rivers, and fire falling from heaven did not all happen within the lifetime of a single man. The Israelites sometimes passed through several generations before another big miracle happened. Just as we sometimes feel alone and abandoned by God today, so often did the Israelites--and often they were in much more dire situations. The fact is that often enough people were able to reason in their own minds His absence from or His ambivalence towards the world. They too did not always recognize the actions of God in the world.
Is God Really Working?
The reason we often do not see the work of God as plain and obvious is because we look for that fire in the sky. However, in searching for these signs, we will always be disappointed. It seems that instead God prefers to work through people. Instead of sending down a bolt of lightning to scare someone into belief, He sends a person to communicate with another. He sets people in our path that we have the opportunity to aid or to learn from. He sends people to give us hope and He sends them to give us direction. God loves more than anything to work through us to accomplish His will. He sends us to be His hands and feet in the world. Not because He is incapable of acting (He could easily accomplish what He wanted to Himself, like when He struck down more enemies in a battle than the Israelites did ... using hailstones) but because He loves to work though us. We are the fire that God sends to the earth--the fire that compels others to believe in Him and serve Him.
Being the Fire
So what does this mean? This means we work to be the salt and light of the world. Interact with others. Help where you can and learn where you can't. Don't be so set in your ways as to ignore wisdom when it is set before you. Pray. Read the Word daily. Be a follower of Christ. Christ lit the world on fire with His actions. We should aim to do the same.