Wash yourselves; make yourselves clean; remove the evil of your deeds from before my eyes; cease to do evil
Create in me a clean heart, O God, and renew a right spirit within me.
1 John 1:9
If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
Purge me with hyssop, and I shall be clean; wash me, and I shall be whiter than snow.
“Blessed are the pure in heart, for they shall see God.
I will sprinkle clean water on you, and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you.
You shall not make any cuts on your body for the dead or tattoo yourselves: I am the Lord.
If you really read and reflect upon these verses, it is pretty convicting. At least I know for myself it is. I do believe that there is more he has given us to reflect on, and these next two verses encompass the full jest it:
1 John 1:7
But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.
Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things.
To keep you spirit pure you need to acknowledge your sin, ask forgiveness for those sins, and make a concerted effort to forsake those sins. In everything we can use Philippians 4:8 as our guide:
Is it true?
Is it honorable?
Is it just?
Is it pure?
Is it lovely?
Is it commendable?
Is it of excellence?
Is it worthy of praise?
If our answer to any of these is "no", then it is probably dirt for our spirit.
When out spirit is dirty, it doesn't matter what the outside. Think of it this way...you can have an immaculately clean vehicle of the finest quality. However, if the engine is full of dirt and debris, it is going to break down and it's worth greatly reduced.
Don't let your engine get bogged down...