I have to also note that in my ~20yrs of corporate experience, the kinder you are, in concert with being as blunt and truthful as possible, the more people will trust and value your input.
I think these traits emerge if you repeat mantra's like the ones above to yourself multiple times a day - when skimming through your emails in the morning (I often just delete or archive all but 1 or 2), when in a meeting that's going in circles or getting heated (I often just smile and leave), when you're running late for work, when you're worried about taking time off, when your air conditioner brakes or you get into a minor fender bender, or $200K of you're employee owned shares are suddenly nullified. It's all a grand illusion, and it just doesn't matter.
This is not one to tell others when they struggle, same as yours, but it can help me from time to time.
You will screw up. There are people smarter than you. Do your best to contribute and be honest about what you know and don't know, and you will be highly valued by your peers.
I like the last bit: What I am saying is this: the score is not what matters. Life does not have to be regarded as some game in which scores are kept and somebody wins. If you are too intent on winning, you will never enjoy playing. If you are too obsessed with success, you will forget to live. If you have learned only how to be a success, your life has probably been wasted.
Just thought I'd say I love this description.