If

1.
If you say that you are not like your "friend," one way or another you are telling a lie.

He who walks with the wise grows wise, but a companion of fools suffers harm.

Proverbs 13:20

2.
If you are thinking of giving up, just remember it's on record.

You yourselves are our letters … known and read by everybody.

2 Corinthians 3:2

3.
If you are going to change the world, you might as well start with changing your world.

… first take the plank out of your eye, and then you will see clearly to remove the speck from your brother's eye.

Matthew 7:5

4.
If you think you can you can; if you think you can't you're right.

"… we certainly can do it."

Numbers 13:31
5.
If you plan to do something, just go right ahead and DO IT.

All hard work brings a profit, but mere talk leads only to poverty.

Proverbs 14:13

6.
If you want to increase your chances of succeeding in what you are doing, do it over and over again – until it succeeds.

Sow your seed in the morning, and at evening let not your hands be idle, for you do not know which will succeed, whether this or that, or both will do equally well.

Ecclesiastes 11:6