Original quote by Archilochus a Greek lyric poet of the Archaic period

We don't rise to the level of our expectations, we fall to the level of our training. - Archilochus

Navy SEALs version:

When you're under pressure you don't rise to the occasion, you sink to the level of your training. Train well! ie proceed to overtrain for every scenario possible.

more elaboration from Ryan Holiday

“The body should be treated more rigorously,” Seneca wrote, “that it may not be disobedient to the mind.”

How can you expect yourself to step out of your comfort zone when the stakes are high if you aren’t regularly doing so when the stakes are low?

We must test ourselves daily. We must make courage a habit.

We must remind ourselves who’s in charge. You, not the pull to be comfortable. You, not the desire for everyone to like you. You, not the need to sound smart and all-knowing.

If you don’t want to fail yourself in the big moments, the best thing you can do is practice the little things. We can crank the knob in the shower to cold. We can volunteer to address the rowdy audience. We can put on the silly costume to please our kids and not care what anyone thinks. We can admit when we don’t know something, at the risk of eye rolls and condescension. We can agree to try what we have never tried before.

Then, when it counts, we’ll know what to do. The brave thing.

The right thing. The thing we’d rather not do but know we have to do.