we must learn from mistakes
'hay que' is impersonal (no specific subject). Followed by infinitive.
We must learn from mistakes so as not to repeat them.
—How did you improve so much? —You just have to learn from your mistakes.
In business, you have to learn from mistakes quickly.
We must learn from mistakes so as not to repeat them.
—How did you improve so much? —You just have to learn from your mistakes.
In business, you have to learn from mistakes quickly.