A Quote by Christian de Duve
What I was concerned with was life: what are the major features that are common to all living organisms that subtly define life. So I looked at the whole problem as a chemist, as a biochemist, and as a molecular biologist.
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I get called lots of things - a biochemist, a molecular biologist, a chemical engineer - and I guess I am all of those. I identify most as human!
The existence of common features in different forms of life indicates some relationship between the different organisms, and according to the concept of evolution, these relations stem from the circumstance that the higher organisms, in the course of millions of years, have gradually evolved from simpler ones.
The concept of evolution postulates that living organisms have common roots, and in turn, the existence of common features is powerful support for the concept of evolution.
No biologist has actually seen the origin by evolution of a major group of organisms.
The problem that we, as living organisms, face - and not we only, humans, but any living organism faces - is the management of life.
The chemical differences among various species and genera of animals and plants are certainly as significant for the history of their origins as the differences in form. If we could define clearly the differences in molecular constitution and functions of different kinds of organisms, there would be possible a more illuminating and deeper understanding of question of the evolutionary reactions of organisms than could ever be expected from morphological considerations.
I naively thought that we could have a molecular definition for life, come up with a set of genes that would minimally define life. Nature just refuses to be so easily quantified.
The nucleic acids, as constituents of living organisms, are comparable In importance to proteins. There is evidence that they are Involved In the processes of cell division and growth, that they participate In the transmission of hereditary characters, and that they are important constituents of viruses. An understanding of the molecular structure of the nucleic acids should be of value In the effort to understand the fundamental phenomena of life.
Primates stand at a turning point in the course of evolution. Primates are to the biologist what viruses are to the biochemist. They can be analysed and partly understood according to the rules of a simpler discipline, but they also present another level of complexity: viruses are living chemicals, and primates are animals who love and hate and think.
I just was mesmerized by all of this life everywhere I looked. And so I wanted to be a marine biologist.
Give up defining yourself - to yourself or to others. You won't die. You will come to life. And don't be concerned with how others define you. When they define you, they are limiting themselves, so it's their problem. Whenever you interact with people, don't be there primarily as a function or a role, but as the field of conscious Presence. You can only lose something that you have, but you cannot lose something that you are.
Evolutionary biologists often appeal to parsimony when they seek to explain why organisms "match" with respect to a given trait. For example, why do almost all the organisms that are alive today on our planet use the same genetic code? If they share a common ancestor, the code could have evolved just once and then been inherited from the most recent common ancestor that present organisms share. On the other hand, if organisms in different species share no common ancestors, the code must have evolved repeatedly.
Only yesterday mankind lived in fear of the scourges of smallpox, cholera and plague that once swept nations before them. Now our major concern is no longer with the disease organisms that once were omnipresent; sanitation, better living conditions, and new drugs have given us a high degree of control over infectious disease. Today we are concerned with a different kind of hazard that lurks in our environment-a hazard we ourselves have introduced into our world as our modern way of life has evolved.
Being happy requires that you define your life in your own terms and then throw your whole heart into living your life to the fullest. In a way, happiness requires that you be perfectly selfish in order to develop yourself to a point where you can be unselfish for the rest of your life.
Four elements, Hydrogen, carbon, oxygen and nitrogen, also provide an example of the astonishing togetherness of our universe. They make up the "organic" molecules that constitute living organisms on a planet, and the nuclei of these same elements interact to generate the light of its star. Then the organisms on the planet come to depend wholly on that starlight, as they must if life is to persist. So it is that all life on the Earth runs on sunlight. [Referring to photosynthesis]
The whole man is involved, the mind, the heart and the will, and a common cause of spiritual depression is the failure to realize that the Christian life is a whole life, a balanced life.
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