21.11.26 Look out for, Live up to

look out: 
you should look out for the birds flying above your head.
she has to look out for the birds flying above her head if she has an job interview.
he would have looked out for the birds flying above his head, if he had known how often the birds poo

Live up to: 
I feel like getting old sometimes means lives up to people's expectation who I like.
if he had been loved enough, he would have tried his best to live up to people's expectation who loves him by himself.
it's something very obvious that a person tries to live up to other loving people's expectation.