This is very true. I realized this a few weeks ago myself. I've seen a video on youtube where a guy talks about discipline being greater than motivation - https://www.youtube.com/watch?v=vMnMp-d5pKs
I like the idea when he talks about 'becoming a machine', that attitude can help in many situations.
I like the idea when he talks about 'becoming a machine', that attitude can help in many situations.