I remember the 1st time I started riding my mountain bike in NC. I was riding downhill thinking this is awesome. This is fantastic, this is what I've always wanted to do. As soon as I hit my 1st incline, I remember thinking this is dumb, this is stupid, who would ever want to do this. I was able to ride uphill a little more each day. I am a flat lander although there are some 100' hills around G'ville.
The downhills make the uphills all worth it.
In life there are no limitations. Except stupidity. If you're stupid, you're screwed.