I.
If you look on while something happens, you watch it happening without taking part yourself.
About 150 local people looked on in silence as the two coffins were taken into the church.
= watch
PHRASAL VERB : V P
II.
or look upon
If you look on or look upon someone or something in a particular way, you think of them in that way.
A lot of people looked on him as a healer...
A lot of people look on it like that...
Employers look favourably on applicants who have work experience.
= consider
PHRASAL VERB : V P n as n , V P n prep / adv , V adv P n