You can become blind to things you see every day. Whether it’s the places you pass on the way to work or the items on your desk, if you see it frequently enough it can eventually hide in plain sight. One of the easiest ways to prove this is to have someone new over to your house. When they are sitting in your living room sipping iced tea just watch their eyes. They will scan the room, drinking it all in and if you look at what they look at you will see things about your own home you hadn’t noticed for a long time, if ever.
We never look at our own stuff with such careful scrutiny. We don’t need to, we can navigate our way through in the dark. That’s why a toy left in the wrong spot or a piece of furniture that’s been moved will always result in a banged shin when we go for a glass of water in the night. Even when the lights are on you can multi-task at home better than anywhere because you don’t have to pay careful attention to get around but can rely on our mental map of what we believe is there.
It can be the same way with our own idiosyncrasies and weaknesses. You can become blind to your quirks just through the sheer frequency of raw impressions. You are always around yourself. Those who are with you less frequently than you are (that would be everyone) see things about you that have become invisible to you over time.
One of the best ways to figure out what your blind spots are is to invert it and use other people as a mirror. What things do those around you do that really get to you? Is it when people interrupt frequently? Talk about themselves constantly? Chew loudly? Gossip incessantly? Your nerves reveal a lot about you for this simple reason, sins we struggle with always look uglier on other people. Chances are there’s some sense of conviction driving your high level of irritation. That’s why David was so ultra ticked at the dude stealing the poor mans sheep in Nathan’s parable–it struck a serious nerve in his life. Being consciously aware of what annoys you can help you discover what you do that’s annoying.
If you try and pay attention to this you will be shocked (and appalled in my case) at the things in your life that you do out of habit without really thinking about how you come across to others. And knowing is half the battle. You can’t ask God to change a problem that you don’t know is there.
Psalm 19:12 Who can understand his errors? Cleanse me from secret faults.