Final answer:
A client's self-confidence is largely influenced by their resilience and belief in their ability to overcome adversities, which is crucial for career success. A supportive network and a clear vision of their career path can also boost their confidence.
Step-by-step explanation:
A client's strongest source of self-confidence often stems from their resilience and a steadfast belief in their own abilities to handle and overcome various challenges. This strength of character contributes heavily to their career success. When questioning sources of support, it's essential to consider both personal resilience and external factors such as mentors, supportive peers, or positive work environments.
To enhance this self-confidence, one might ask themselves "What (or who) is supporting me in moving in a positive direction?" Additionally, envisioning what lies ahead on your career path can help in reaffirming goals and ascertaining the direction of personal and professional growth, thereby fortifying self-belief and motivation.