If you are too determined, and only focus on yourself, you will miss emotional signals from clients. However, if you adapt more to them, you can get a client to agree more easily.
Self-improvement allows us to focus on our shortcomings that we notice. But without self-awareness, there is no way to improve. You need to be flexible and aware of what you need to work on as a person. For example, if you are aware that you need to better assess yourself, you also need to adapt to the knowledge that your self-improvement is not just about asking better questions, but also about being able to adapt to other communication styles by listening more.
Development always brings stages of uncertainty that make room for our decisions. These stages are the same as the waves in the ocean - you know they come repeatedly and never stop. You can either let them hit you, or learn to surf them and be ready the next time they roll in at you.
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