Draw upon
Definition 1 of 2
Pro Tip 1/3Resource Recall
Often implies remembering and using information learned in the past. 
I had to draw upon my high school Spanish to navigate the city.
Pro Tip 2/3Internal Assets
Refers to using personal skills or qualities rather than external help. 
For the leadership role, he needed to draw upon his inner strength.
Pro Tip 3/3Contextual Use
It's used when facing challenges, where previous learning is beneficial. 
During the negotiation, she had to draw upon her legal knowledge.