"Souls," he tells us, "are weighed in silence, as gold and silver are weighed in pure water, and the words which we pronounce have no meaning except through the silence in which they are bathed
Key Points Tobacco products cause a variety of cancers, including those of the lung, oral cavity, nasal cavity, larynx, oropharynx, hypopharynx, oesophagus, stomach, liver, pancreas, bladder, ureter, kidney and cervix, and myeloid leukaemia
Positive mindset Think positive, do positive
Data from a growing number of studies indicate that electronic cigarettes are far from harmless
Cross-tolerance occurs when a person develops a physical tolerance to a specific substance, which then translates to tolerance of other drugs