Much like doctors, there's a reason you shouldn't try to lie to your lawyer
A lot of people like to think they are very very smart - maybe even smarter than the experts they're paying good money to. The problem with that is that 95% of people actually AREN'T that smart at all!
Let the experts do their jobs, and lying to your attorney just means they can't formulate the best, most comprehensive legal strategy for your case. They'll get paid either way, so you're just screwing yourself.