There are three things that make me feel like a small person in a big, big world: certain places, circumstances and time. Not "small" in a bad way. In a "God put you here for a reason" way. When I experience those places, circumstances and times-- it reminds me of my purpose. God speaks to my heart. He's always spoken to me through those three means. I can count on it every time. All I have to do is get away and He'll be there!
Some people feel great being "big" or "powerful". But it's great to be vulnerable and small. You get to experience people's genuine care for you, and drink that in. You don't even have to play the victim. Just care for and love people deeply... and meaningfully. You will find yourself being cared for and loved deeply as well. Being like this makes you more susceptible to the enemy's fiery arrows, but that's what our armour is for. God is fighting for us. Stand up and be bold-- go ahead and make a difference in people's eternal lives.