Over a year again

So it has been over a year since I last posted. I should really write more often. I wonder if I put some relavent words in here if it would come up higher on a google search?

I was reading in Proverbs tonight and I came across a familiar verse.
4:23 - Above all else, guard your heart, for it is the wellspring of life.

I have heard this used in relation to romantic relationships. You cant give your heart away Proverbs says to guard it. While it may be true to be careful who you give your heart to, I think this verse is talking about something else here. The verses surrounding this verse are talking about righteous living and wicked living. What does it look like and what are the consequences of living a wicked life? Or a righteous life? I think what the Solomon is getting at is that what is in our hearts plays out in our actions. If we are careful about what we put into our hearts, that we make sure it is righteousness, then we will reap the benefits of living out a righteous life. If I continually put into my heart what is contrary to God's way of living I cannot expect to live out the life of love that Christ calls us to.

What do I allow into my heart that will keep me from living the life that God desires me to live?