il passo

Che nessuno faccia il passo più lungo della gamba.

"Let no one take a step that's longer than his stride." This proverb actually comes from Horace! 

(Don't bite off more than you can chew.) A cautious reminder not to attempt what exceeds your capacities.

Grammatically we get a reminder that when comparing two nouns (passo and gamba) with regards to a single quality (lungo), we use "di" to say "than," not "che." C4N!