Aikido instructor George Leonard on mastery:
​”How long will it take me to master Aikido?” a prospective student asks.
“How long do you expect to live?” is the only respectable response.

From James Clear newsletter.

(I think you can replace (Ctrl + H) Aikido with Excel.)

James Clear

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

Marie Curie (1867 – 1934)

I have spent my days stringing and unstringing my instrument, while the songs I came to sing remain unsung.

Rabindranath Tagore (1864-1941)

 

Plan for the future because that’s where you are going to spend the rest of your life.

Mark Twain (1835-1910)

Don’t wish it was easier, wish you were better.

Don’t wish for less problems, wish for more skills.

Don’t wish for less challenges, wish for more wisdom.
Jim Rohn (1930 – 2009)