Chess lesson : brilliant but unncessary

Grandmasters make a living finding clever moves when it looks like they are about even, but in fact they have some genius idea that shows that they really are winning. So if you are rated 2300+ and want to win with a flashy combintation to show everyone how good you are, we trust you can do it without much risk. But if you are already way ahead, then you have to be very careful that if you play something tricky, the one who will be tricked is not you! If you are not that good, you are taking a big risk by making "brilliant" but unncessary moves that raise the chances that you can miscalculate and throw it all way. When you have more to gain, that's when you want to be more careful, so the more ahead you are, the more careful you should be. Note that this is not to say the opposite, that when you are way ahead you should play very defensively and passively - that's not usually good either. But the "normal" middle ground should be sufficient.