Take your courage in both hands
Definition 1 of 1
Pro Tip 1/3Emotional Weight
The phrase emphasizes the emotional challenge before a daunting task. 
She took her courage in both hands before addressing the crowd.
Pro Tip 2/3Moment of Decision
It's often used at the moment when a person decides to face a fear or make a difficult choice. 
He took his courage in both hands and finally asked for the promotion.
Pro Tip 3/3Not Literal
The phrase is metaphorical; one doesn't literally grab anything with their hands. 
After hesitating, I took my courage in both hands and jumped into the pool.