there is some truth to rumors
reveal a secret
where there's smoke, there's fire
cross that bridge when we get to it
piece of cake
a very easy task
it is better to hold on to what you have than to risk losing what you have on the chance of something better
boil down to
people form groups with people who are similar to them
easy as pie
something that is very difficult to find
birds of a feather (flock together)
a bird in the hand (is worth two in the bush)
(looking for) a needle in a haystack
let the cat out of the bag
solve that problem in the future when it is important
the most important thing/the summary/to make a long story short
very easy
