Justification

Contrary to what you may be thinking, this blog is not part of the long ongoing debate in Calvinistic circles on the modern doctrine of justification by faith alone.  I will be musing on something a little more practical.
This thought picks up where I have left off in previous blogs.  Some time ago, I ruminated on the idea of why we do the things we do.  I would like to pick up from there and consider how we justify the things we do and think.
Any justification we give for our thoughts, actions or interests can come from a variety of places.  We can deceive others actually quite easily.  We can deceive ourselves, but it usually backfires on us.  But we can never deceive God.  No matter what, no matter how articulate or complex our rationale or justification is for our thoughts and actions, if it is not honest, accurate or true, then it is all for naught.  The truth will be present and it may condemn us.
Do we justify it by appealing to common practice (but everyone is doing it)?  Do we justify it by speaking to our own desires (I want to do it, so it must be ok)?  Or is it simply a matter of not thinking about it at all?
We can think it through now and deal with the huge number of situations and sinful tendencies in which we find ourselves, or we can ignore rational thought and try to explain/justify ourselves before the judgment seat of God at the last judgment.
I'm thinking sooner is probably better.