Credit to IBOHUNT's comment in another thread.
Well do ya punk? I like it! I have done a couple of climbs in my life but didn't have a Garmin. The times I struggled up a steep section I felt like I was just getting tired and contributed the feeling as defeating. Now I monitor the grade and if I feel tired I can justify it by the grade.
In other words, if I have been on a 6% grade for some time but start struggling a bit, if I see a 12% reading, I know I just have to get passed this section then it's back to feeling normal. Gives me hope that it will get better.