1 Timothy 4:12

Let no man despise thy youth; but be thou an example of the believers, in word, in conversation, in charity, in spirit, in faith, in purity.

Paul tells us to not let anyone look down at us because we're young, but to be an example for others. An example in speech, conduct, love, faith, and purity. In speech , don't be cursing and taking God's name in vain. Conduct in the way we act, so we should act maturely so people can trust us. Being an example of faith means having a good relationship with God and it shows. To live in purity means to guard your heart until marriage. Use all of these to be an example to others.