Romans 4:20-21
Yet he did not waver through unbelief regarding the promise of God, but was strengthened in his faith and gave glory to God, being fully persuaded that God had power to do what he had promised.

The most important faith of all, is the one towards Christ Jesus, that He is our Lord and Savior, who died as a ransom for our sins, and rose again to give us eternal life.
I find that believing that statement is easy, but actually living it up in my daily life is hard. What I also find is that since Christ has the power to save us from death, He also has power to change our lives, our situations--and sometimes, other people's lives through us.

Stepping up in faith is not "Being prepared for something completely, then thinking 'This is going to work just fine.'" Instead, it is doing the best we can and leave the rest to God.

For example: last November was the birthday of a good friend of mine at work. I really wanted to give her a birthday present, and I found just the right one for her. It is "The Case for a Creator" by Lee Strobel. I bought the book, then spent several days going back and forth between giving it to her or not. She herself is an atheist, and she evaluates everything by logic. I was afraid she would get offended about her belief, or if she would look down upon me. Yea, there goes my selfish thought -- concerned about myself than about a good friend's eternal salvation.
I prayed for a few days.. and I really wanted to give the book to her, so I said this to God, "Lord, if it is your will, please.. soften her heart when reading this book. Give her the wisdom to see that this world did not happen by chance, but by Your works. And tell her about Jesus."
I was pretty nervous when she opened the gift at the office. Oh man did I wish she opened it at home. But it was truly God's work--she smiled, said thank you, and did not show any disrespect or anything to me, that day and till now. In fact, we are still very much good friends.

I don't know how much she has read the book by now, or how much she believes in one true God, if at all. But I trust the Lord wholeheartedly that He is working in her, growing her knowledge about God, and bringing more witnesses in her lives.