Consider well what your strength is equal to, and what exceeds your ability.
Seize the day [Carpe diem]: trust not to the morrow.
A portion of mankind take pride in their vices and pursue their purpose; many more waver between doing what is right and complying with what is wrong.
Force without judgement falls on its own weight.
If you would have me weep, you must first of all feel grief yourself.
It makes a great difference whether Davus or a hero speaks.