nothing is right or wrong but thinking makes it so ~ from Act 2, Scene 2 of Shakespeare’s Hamlet
Fools rush in where angels fear to tread ~ A person who does not plan ahead and think matters through becomes involved in risky or unfavorable situations which prudent people avoid.
He who who hesitates is lost ~ A person who spends too much time contemplating what to do may miss a valuable but fleeting opportunity.
If a person betrays you once it is their fault, if a person betrays you a second time its your fault. Doesn’t leave a lot of room for forgiveness but maybe its true in some cases.