Found 9 quotes starting with IR:

Iron rusts from disue; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind. – Leonardo da Vinci, The Notebooks
Iron rusts from disuse water loses its purity from stagnation and in cold weather becomes frozen even so does inaction sap the vigors of the mind. – Leonardo DaVinci
Iron rusts from disuse; water loses its purity from stagnation and in cold weather becomes frozen; even so does inaction sap the vigors of the mind. – Leonardo da Vinci
Irony is the hygiene of the mind. – Princess Elizabeth Asquith Bibesco
Irrational barriers and ancient prejudices fall quickly when the question of survival itself is at stake. – John Fitzgerald Kennedy
Irrationally held truths may be more harmful than reasoned errors. – Thomas Huxley
Irresponsible power is inconsistent with liberty, and must corrupt those who exercise it. – John Calhoun
Irreverence is the champion of liberty and its one sure defense. – Mark Twain
Irrigation of the land with seawater desalinated by fusion power is ancient. It's called 'rain'. – Michael McClary

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