No one knows his true character until he has run out of gas, purchased something on the installment plan and raised an adolescent.

Cox’s line is a comic test of character built from three ordinary stressors: being stranded (running out of gas), being financially obligated (buying on installments), and enduring prolonged emotional strain (raising an adolescent). Each scenario strips away performative self-image and replaces it with impatience, anxiety, or responsibility—conditions under which temperament and ethics become visible. The humor comes from the escalating sequence: a brief inconvenience, a long-term economic commitment, and finally a demanding human relationship that resists control. The quote suggests that “true character” is revealed less by grand crises than by how one behaves when inconvenienced, indebted, and challenged by someone else’s growing autonomy.