It's easier when you don't have to use a hat for views and your butt can tell you what the airplane is doing.

One of the hardest things for people to learn to do is ignore their body sensations when learning to fly on instruments in IFR weather. When you see a student, recovering from unusual attitudes, on the gauges, quickly recovering to straight and level flight, then you know he has mastered the art of mental discipline of trusting what the gauges are telling him and then you know he is on the way to becoming a instrument pilot.
Then comes that day or night when he has to punch through a area of "boomers". Now all of a sudden a whole new set of varables comes into play. What with ATC giving him vectors to help him through the mess, bumps, up drafts, down drafts, went from daylight to all of a sudden, very dark and had forgotten to turn on his instrument lighting system, thinks the lights had failed, trying to locate a flash light, can't stay within 500 feet of assigned altitude and knowing other aircraft are in the same general area, sweat running down into your eyes, can't see to good then and then you bust through into bright sun light and you are still right side up and a great sense of relief comes over you and then you know that you are truly the master of instrument flying!