"I read one or two other books which gave me a background in mathematics other than logic"

This quote by Stephen Cole Kleene suggests that he checked out books outside of the realm of logic in order to gain a better understanding of mathematics. This indicates that he was wanting to get a more comprehensive knowledge of mathematics, and that he felt that logic alone was insufficient to offer him with the needed background. This might be analyzed as an indication of his commitment to discovering and his desire to end up being an expert in the field of mathematics. It likewise recommends that he was willing to exceed the conventional limits of mathematics in order to acquire a much better understanding of the topic. This quote is a testament to the importance of broadening one's understanding and exploring brand-new locations of research study in order to end up being a specialist in a particular field.