Here is a list of phrases, sayings and common expressions starting with L.
Laugh and the world laughs with you weep and you weep alone
laughter is the best medicine
let bygones be bygones
let not the sun go down on your wrath
let sleeping dogs lie
let the punishment fit the crime
life begins at forty
life is what you make it
lightening never strikes twice in the same place
live for today for tomorrow never comes
love is blind
love of money is the root of all evil
love thy neighbour as thyself