DEBER vs. TENER QUE — two debts that sound almost the same
Tener que is obligation — there's no way out. Deber is what's right — there is a way out, and that's what makes it heavy. Debo mil pesos, where deber stops being moral and becomes arithmetic. Deberías haberme dicho — regret, built out of a should. And why almost nobody actually says 'I should.'