Ability to Count to Two. Opening Talk at the Third International Sakharov Conference on Physics

Third International Sakharov Conference on Physics organized by the Theoretical Physics Department of the Lebedev Institute, Russian Academy of Sciences, covered wide scope of topics: astrophysics, fusion, high field, high pressure and high density research, superstrings and dualities, brane world and quantum gravity, quantum field theory and high energy physics. This short Opening Word however exceeds the bounds of physics - it is about three "dynamical characteristics" of Sakharov's methodology and way of thinking: "Artseulov method", "a permanent feeling of possible personal error", and ability "to count to two", which in present days is not less demanded than before.