Quote by Frederick Sanger
Influenced by him, and probably even more so by my brother Theodore (a year older than me), I soon became interested in biology and developed a respect for the importance of science and the scientific method.
Summary
This quote suggests that the speaker's interest in biology and appreciation for the scientific method were influenced by someone (presumably a figure mentioned earlier in the context) and their older brother, Theodore. The speaker considers their brother's influence to be even stronger than the initial person mentioned. Consequently, this importance placed on science and the scientific method likely stems from the guidance and inspiration provided by these individuals.