Allowing God to Guard
We all try so hard to confine our decisions so that they lead down a narrow path where potentially no mistakes can be made. In the mean time, God is trying to expand our thinking so that we have the freedom to take risks. The only thing keeping us from liberty and the prison ground that we create for ourselves is our thoughts. We can attempt to guard ourselves to the extent that we become religious and judgmental of anyone who does not stay away from the "sinful" activities that we do.
We can unintentionally fall in step with the world's way of doing things and we can try to guard ourselves out of fear. If we're cautious to the extreme, then nothing can harm us, physically or emotionally. At least that's what we can become deceived into thinking. We still need to do our part, but then just rest, knowing that we have the mind of Christ and trusting that God has put within us good decision-making ability. If we guard too many aspects of our lives by ourselves, anxiety can rise up and God hasn't called us to live in that (Philippians 4:6).
When we know that we have the very spirit of God living on the inside of us and that this spirit is our true nature, then we will naturally be able to discern what we should allow in our surroundings.
Guarding What Comes Out
Sometimes we can guard ourselves so much that not only is input not coming in but who we are in Christ is not coming out.