Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigour of the mind.Leonardo da Vinci
As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.Leonardo da Vinci
Have courage for the great sorrows of life and patience for the small ones; and when you have laboriously accomplished your daily task, go to sleep in peace.Victor Hugo
To be perfectly happy it does not suffice to possess happiness, it is necessary to have deserved it.Victor Hugo
He, who every morning plans the transactions of the day, and follows that plan, carries a thread that will guide him through a labyrinth of the most busy life.Victor Hugo
Reaction - a boat which is going against the current but which does not prevent the river from flowing on.Victor Hugo