William Carey is regarded as the “Father of Modern Protestant Missions”. For 41 years he preached the gospel to India. He is also credited, along with his team, for making the first Bengali translation of the Bible. While we do not agree with his doctrinal stance, he is undoubtedly a very important figure in the history of missions.
If you are considering the OYC, you may find his 11 mission commandments encouraging. Here are a few:

1.  Set an infinite value on immortal souls.

9.  Work with all your might to translate the Bible into their languages.  Build schools to this end.

11.  Give yourself totally to this glorious cause.  Surrender your time, gifts, strength, families, the very clothes you wear

Read the whole thing.