God's Mission Girl...

Therefore, by the deeds of the law no flesh shall be justified in His sight, for by the law is the knowledge of sin.

This is saying that NO ONE is perfect...even if you think you are. AND that the law is written to SHOW you that you're not perfect. Realising you're not perfect is ESSENTIAL in the path to becoming a Christian because if you think you're perfect than you won't repent because you think that you don't have anything to repent of and THEN you won't be a real Christian.

Trust in the LORD with all your heart; and lean not on your own understanding; in all your ways acknowledge Him and He will direct your paths.

This basically means that God will take care of you if you put your faith in Him. Don't trust in yourself, trust in Him and Him alone.

For God so loved the world that He gave His only begotten Son; that whoever believes in Him should not perish but have everlasting life.

This is saying that God loved us SO much that He sent His ONLY Son into the world to die so that all who believe in Him will go to Heaven and not Hell.

Don't let anyone look down on you because you are young; but set an example for the believers in speech, in life, in love, in faith and in purity.

This is saying don't let people say that you're not a true Christian because you're young. You need to set an example for them in ALL aspects of life.

1, There is a time for everything, and a season for every activity under heaven:
4.a time to weep and a time to laugh, a time to mourn and a time to dance,

This just means that there is a time for absolutely anything. You don't have to be happy ALL the time, in fact if you did it would be inappropriate; for example if you were at a funeral and you were 'happy' than that would be wrong. So always make sure your attitude is appropriate for the moment.

Ask and it will be given to you; seek and you will find; knock and the door will be opened unto you.

This is talking about Salvation. If we ask for it we'll get it, if we look for it we'll find it and if we knock on it's closed door it will be answered; WE WILL BE SAVED!!!

For I know the plans I have for you, DECLARES the LORD, plans to prosper you and not to harm you; plans to give you a hope and a future.

This is God's way of saying"I know what I have in store for you and what I have in store for you is GOOD. You will not be harmed and I will give you a hope for eternal life. I will not give you any more trials than you can handle because I know you."

I can do all things through Christ who strengthens me.

This basically means that you can do ANYTHING that God plans for you, even if its hard, WITH Christ's help. 

My God shall supply all your needs, according to His riches in glory; by Christ Jesus.

This means that God will give you everything you NEED, let me repeat...NEED not WANT!!! Big difference!!!

Whether you eat or drink, or WHATEVER you do, do all to the glory of God.

This is a pretty easy verse to understand - you need to do your best in EVERYTHING. You need to do EVERYTHING as if you're doing it for God.