Francis Bacon quotes
If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties. 
A wise man will make more opportunities than he finds. If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties. A wise man will make more opportunities than he finds.