An honest man, armed with all the knowledge available to us now, could only state that in some sense, the origin of life appears at the moment to be almost a miracle, so many are the conditions which would have had to have been satisfied to get it going.

It has yet to be shown by direct biochemical methods, as opposed to the indirect genetic evidence mentioned earlier, that the code is indeed a triplet code.

A good scientist values criticism almost higher than friendship: no, in science criticism is the height and measure of friendship.

In my experience most mathematicians are intellectually lazy.

It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.

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

Exact knowledge is the enemy of vitalism.