The death of President Muhammadu Buhari’s Chief of Staff, Abba Kyari, last Friday, like the death of any mortal, calls for sober reflection. May God grant the repose of his soul. However, for all of us – politicians, those controlling the levers of political power, lowly-placed people and humanity in entirety – the major lesson therein, aside the ephemerality of life, is that this passage is another wake-up call on us not to assume our immortality. If the high and mighty can fall when death stings them, no man is…