Verb
break down, literally or metaphorically
to take one's place in a military formation or line
become part of; become a member of a group or organization
Source: WordNetfall-in
It is better to fall in with crows than with flatterers; for in the one case you are devoured when dead, in the other case while alive. Antisthenes
To fall in love with God is the greatest romance; to seek him the greatest adventure; to find him, the greatest human achievement. Augustine of Hippo
Never stop smiling not even when you're sad, someone might fall in love with your smile. Gabriel García Márquez
If you fall in love let her be a beauty; if you should steal, let it be a camel. Lebanese Proverb
Hew not too high, lest a chip fall in thine eye. Dutch Proverb
He who digs someone else's grave shall fall in it himself. Bulgarian Proverb