Avoid the temptation to work so hard that there is no time left for serious thinking.

It now seems very likely that many of the 64 triplets, possibly most of them, may code one amino acid or another, and that in general several distinct triplets may code one amino acid.

There is no form of prose more difficult to understand and more tedious to read than the average scientific paper.

Our ... advantage was that we had evolved unstated but fruitful methods of collaboration ... If either of us suggested a new idea, the other, while taking it seriously, would attempt to demolish it in a candid but non-hostile manner.

Do codons overlap? In other words, as we read along the genetic message do we find a base which is a member of two or more codons? It now seems fairly certain that codons do not overlap.

Biologists must constantly keep in mind that what they see was not designed, but rather evolved.

For simplicity one can think of the + class as having one extra base at some point or other in the genetic message and the - class as having one too few.