niet geschoten is altijd mis

Etymology
Roughly, “not shooting always equals missing”, or “[a shot] not fired always misses”.

Proverb

 * 1) nothing ventured, nothing gained; it is worth a shot; he who dares, wins; fortune favors the bold

Usage notes

 * A near-synonym of : the latter is used specifically to encourage someone to ask or request something from another, whereas this proverb is used more generally to encourage someone to try something.