Slow but sure.
Curiosity killed the cat.
There's no smoke without fire.
Actions speak louder than words Link to proverb.
He that goes a-borrowing, goes a-sorrowing.
For want of a nail the shoe was lost; for want of a shoe the horse was lost; and for want of a horse the man was lost.
You can't hold with the hare and run with the hounds Link to proverb.